A person commits disorderly conduct when he or she knowingly:
(A) 
Does any act in such an unreasonable manner as to alarm or disturb another and to provoke a breach of the peace;
(B) 
Transmits or causes to be transmitted in any manner to the Fire Department of any city, town, village or fire protection district, a false alarm of fire, knowing at the time of the transmission that there is no reasonable ground for believing that such fire exists;
(C) 
Transmits or causes to be transmitted in any manner to another a false alarm to the effect that a bomb or other explosive of any nature or a container holding poison gas, a deadly biological or chemical contaminant, or radioactive substance is concealed in a place where its explosion or release would endanger human life, knowing at the time of the transmission that there is no reasonable ground for believing that the bomb, explosive or a container holding poison gas, a deadly biological or chemical contaminant, or radioactive substance is concealed in the place;
(D) 
Transmits or causes to be transmitted a threat of destruction of a school building or school property, or a threat of violence, death, or bodily harm directed against persons at a school, school function, or school event, whether or not school is in session;
(E) 
Transmits or causes to be transmitted in any manner to any peace officer, public officer or public employee a report to the effect that an offense will be committed, is being committed, or has been committed, knowing at the time of the transmission that there is no reasonable ground for believing that the offense will be committed, is being committed, or has been committed;
(F) 
Transmits or causes to be transmitted a false report to any public safety agency without the reasonable grounds necessary to believe that transmitting the report is necessary for the safety and welfare of the public; or
(G) 
Calls the number “911” for the purpose of making or transmitting a false alarm or complaint and reporting information when, at the time the call or transmission is made, the person knows there is no reasonable ground for making the call or transmission and further knows that the call or transmission could result in the emergency response of any public safety agency;
(H) 
Transmits or causes to be transmitted a false report to the Department of Children and Family Services under Section 4 of the Abused and Neglected Child Reporting Act;
(I) 
Transmits or causes to be transmitted a false report to the Department of Public Health under the Nursing Home Care Act, the Specialized Mental Health Rehabilitation Act of 2013, and ID/DD Community Care Act, or the MC/DD Act;
(J) 
Transmits or causes to be transmitted in any manner to the police department or fire department of any municipality or fire protection district, or any privately owned and operated ambulance service, a false request for an ambulance, emergency medical technician-ambulance or emergency medical technician-paramedic knowing at the time there is no reasonable ground for believing that the assistance is required;
(K) 
Transmits or causes to be transmitted a false report under Article II of Public Act 83-1432;
(L) 
Enters upon the property of another and for a lewd or unlawful purpose deliberately looks into a dwelling on the property through any window or other opening in it; or
(M) 
While acting as a collection agency as defined in the Collection Agency Act or as an employee of such collection agency, and while attempting to collect an alleged debt, makes a telephone call to the alleged debtor which is designed to harass, annoy or intimidate the alleged debtor. (See 720 ILCS 5/26-1)
A person who refuses or knowingly fails, upon command, to reasonably aid a person known by him to be a peace officer in the following commits a misdemeanor:
(A) 
Apprehending a person whom the officer is authorized to apprehend; or
(B) 
Preventing the commission by another of any offense.
(See 720 ILCS 5/31-8)
(A) 
Drive-in Business. A drive-in business within the meaning of this Code shall be deemed to be any business where meals, sandwiches, cold drinks, beverages, ice cream, food, drink, or consumer services are served directly to or are permitted to be consumed by patrons in or upon automobiles, motorcycles, or other vehicles parked on the premises.
(B) 
Declared Public Places. For the purpose of preserving public peace, health and safety, the entire premises occupied by a drive-in business, together with means of ingress or egress, are hereby declared to be a public place;
(1) 
No person on the premises of a drive-in business shall race the motor of any motor vehicle, needlessly bring to a sudden start or stop, any motor vehicle, blow any horn of any motor vehicle, or cause to be made any loud or unseemly noise, nuisance or disturbance whereby the quiet and good order of the premises or the neighborhood are disturbed.
(2) 
The following acts or conduct of any persons entering a drive-in business or premises are hereby declared to be unlawful, and any person found guilty of any such acts shall be guilty of a violation of this Article:
(a) 
Entering the premises of any drive-in business with any motor vehicle of any description and parking such vehicle and leaving the premises (thereby leaving such vehicle parked and unoccupied), without express consent of the owner or operator of such business, in which event, such motor vehicle shall be subject to a parking citation or may be impounded subject to the usual impounding charges.
(b) 
Entering the premises in or upon a motor vehicle and using said premises for cruising, racing as a shortcut to another street or to annoy or endanger any person or persons or other vehicle or vehicles lawfully on said premises.
(c) 
For three (3) or more persons to congregate on the premises and linger or loiter at any location on the premises of any drive-in business, other than in the building or in a legally parked motor vehicle.
(d) 
For any person who, while on the premises of any drive-in business, in the presence or hearing of another, to curse or abuse such person or use any violently abusive language under circumstances reasonably calculated to provoke a breach of the peace.
(C) 
Posting Sign. It shall be the responsibility of the business operator to post on the premises in a conspicuous location, one (1) or more signs bearing the following legend in letters at least two (2) inches or more in height and readable:
“CRUISING IN OR CONGREGATING AND LOITERING OUTSIDE A MOTOR VEHICLE IS UNLAWFUL. NO UNOCCUPIED MOTOR VEHICLES MAY BE LEFT ON THE PREMISES WITHOUT THE CONSENT OF THE OWNER.”