Who is they? Law enforcement officers can arrest you just about anytime, anywhere if they have a warrant. As far as I know, the Illinois Secretary of State doesn't spend their time chasing down warrants. I've had many, many clients go get a State ID or even renew an Illinois driver's license without issue despite an active warrant. That said, if the police officer who knows and loves you happens to be standing there and sees his good buddy that has a warrant, yes - you will be arrested.