Plenty! usually as part of a Black Bloc (or other Bloc) Ive been arrest a few time for it...I was arrrested at the G8 Summit last year in south GA and spent 8 days in jail until I was bailed out but there were other kids in there with me...I was also arrested most recently at an anti-Halliburton protest in Houston where they gave me a felony assault charge (i didnt do it though...cops lie) the video of that arrest is here
http://houston.indymedia.org/news/2005/05/39546.php (ium the one with the ripped off shirt being taken down)...that video was all over every major news station includign fox news and my picture has been in tons of papers (USA TODAY! and the Progressive magazine)...it just came out in the paper 2 days ago that the grand jury has cleared me a 2 other arrestees of the assault charges because there is not evidence to support that we commited any crime.

im the sirt less one there, thats from the halliburton protest
ive been to many others but managed to not get arrested at em...i was arrested twice at an anarchist convergance though
activism is my life...either im on the road planing or doign some type of activism or im temporarily settled down dealing with some negetive ramifications of some activism