San Francisco anti-SUV activist Robert Lind stalks “these gas-guzzling SUVs being used by people who don’t really need them” and slaps bumper stickers on them pointing their owners to his website, where they hear about the harm Lind claims their vehicles are doing to the environment and receive helpful hints aboout how to remove the bumper stickers. “If you ‘tag’ ANY of the three trucks I own, you will wake up in the hospital” is one response he receives on the site’s bulletin board. [via Spike Report]