In early '03, a group of us FReepers went into downtown Houston to FReep an A.N.S.W.E.R. anti-war rally. (We really pissed 'em off by being there, too.)
Anyway, we got there before the rally started so we could set up. A couple of our guys walked around the parking area and wrote down license plate numbers of any cars that had "NO WAR" and other such bumper stickers on them in conjunction with expired tags or inspection stickers.
The police were very friendly to us and got us a kick-ass location for our FReep. Our guys gave them the list of license plate numbers and pointed out the general area of where the offending vehicles were parked.
:-)
I remember that! Wasn't that when the cute little boy held a sign and helped us out?