Hexod.us has an intriguing story about some loony armed with a hand-scraper untagging stuff in Silverlake.
When I approached him, he launched into what seemed to be a fairly canned spiel: "I am the anti-tagger, removing stickers from the Atlantic to the Pacific, all fifty states..." or some such buggery like that.
OK. That's cool I guess...but what's his deal? Is he a local? Is he someone who got community service once and just couldn't stop? Obsessive-compulsive? Art critic? Jerk? Or does he just think street art blows?