There's a YouTube video of someone pulling a cop off a protestor during the RNC this week.

As more people see and get angry about various cases of excessive police force (so easily disseminated on the internet), I predict we will see a growing number of incidents where citizens fight back.

I adore(d) the Tivoli PAL, but fair warning... mine suffered hugely from GSM interference from my phone. I finally switched to a different set of speakers and the problem went away.