Don't do drugs, kids.
I'm not ashamed to have liberal political views, but very few liberals not on LSD want to have anything to do with this kind of ridiculousness. The taser was a bit over the top, but seriously...how long are you gonna make John Kerry sit on the stage while the guy resists arrest? Masking tape and tranquilizer darts would've been better, I think.
Does anybody remember the wacko young dude who went totally nuts on the 9/11 commission chair Lee Hamilton after his K-State Landon lecture in '05, claiming that the committee had no interest in finding fault with Bush's reaction and that he believed that the US government conspired to destroy the twin towers for political reasons? I was embarrassed for everyone there...not because he asked somewhat ridiculous questions - or made somewhat ridiculous claims, I should say - but because he wouldn't sit down, shut up, and stop monopolizing the discourse.
Anyway, next time you drop acid and feel politically charged, don't go to a significant political speech. Jeebus.