There was one in the building that houses the lab where I did my graduate work a few years ago. There was some big international meeting of some sort going on in the next city over and a bunch of protesters showed up (naturally). Well, some came out to my university and had a big protest against genetically modified trees and the picked my building for their protest. A few of them came in the lobby and were shouting slogans. Another idiot put a U-lock (normally for bikes) around his neck and locked himself to the stairs while his buddy used climbing ropes to suspend himself in the middle of the stair well tied to a DNA sculpture that went from the bottom to the top floor. We had police with riot shields on all the floors keeping them out of the labs. It was rather amusing for those of us working there. The most unpleasant part was the smell--I don't think any of these protesters had showered in a long time.