Astroturf v. Grassroots PR

So, is astroturf to blame for the chaos at these health care town hall meetings (When Astroturf Goes Too Far, Zelizer)? Or, is it simply genuine citizen angst? Based on this (Let's Talk Astroturf, Howe), I would say there is plenty of astroturf coming from pro-reformers, but you can't write it all off to that. The opponents and the supporters both genuinely care and are passionate about their views. The philosophical differences between the two sides are huge, which does not make civility an easy thing to maintain.