SO.... not a choir boy.
Although... I do not approve of Illinois gun laws at all. Depending on what the “unlawful use” was and if it passes the 2A sniff check... My opinion could change...
“Unlawful use” in illannoy probably just means touching one without an FOID.
Any possession laws, FOID, permit or license requirements are a violation of the rights recognized by the second amendment. Only use in a crime should be punished.