No, but I'm usually a passenger accompanied by 2 locals, but women. I think they do it because they believe these guys will do sth. It's not every day, but I'm usually there while something is going on and parking is hard to get. I like to use the new underground parking now.
Honestly I think it is unusual, maybe it happens to you. I don't have problems I have Polish numberplates. In the past I used to park my car on French numberplates and it wasn't a problem as well. Maybe you have different expirience ...
don't pay :) and don't worry ;) that is all
is it on Plac Wolności?where in front of bank entrances
there are so many cameras there ... ;) I wouldn't be worried about my car there ...