PWK is right north of ORD. The usual crappy weather approach is ILS 16 circle to land 34, with the restriction to remain within a mile or so of the 34 threshold .
If you get much south of that, especially at the jet pattern altitude of 1500', the guys at ORD get very pissy. It's easy to get a down there in a hurry and then start cranking hard to stay out of the inner ring of the ORD Bravo.
I probably go in there twice a month, and while I've never busted the clearance, there but for the grace of God...