(720 ILCS 5/16F‑3) Sec. 16F‑3. Theft of wireless service. (a) A person commits the offense of theft of wireless service if he or she intentionally obtains wireless service by the use of an unlawful wireless device or without the consent of the wireless service provider. (b) Theft of wireless service is a Class A misdemeanor when the aggregate value of service obtained is less than $300 and a Class 4 felony when the aggregate value of service obtained is $300 or more. For a second or subsequent offense, or if the person convicted of the offense has been previously convicted of any similar crime in this or any other state or federal jurisdiction, theft of wireless service is a Class 2 felony. (Source: P.A. 89‑497, eff. 6‑27‑96.)
WiFi Theft - WiFi theft occurs when someone installs a wireless network in a residence or business location and intentionally enables others to receive broadband service for free over their wireless network. Wireless networking is a great product, but when using a wireless network subscribers should always secure their home networks from unauthorized users. Unsecured wireless networks allow others to access a subscriber's network and potentially see all of the subscriber's personal files, allow potential criminals and terrorists to send untraceable communications or allow an individual to download illegal materials, such as copyrighted or obscene material that would lead back to the subscribers modem.