Also, not everyone appreciates self-righteous Critical Massers, so be careful.
http://www.youtube.com/watch?v=oUkiyBVytRQ
http://www.nytimes.com/2008/07/29/nyregion/29critical.html
i actually get pissed off as a driver when people cycle on a road when there is a bike lane one block away and get pissed off as a cyclist when people drive on my bike lane/bike route.
if you aren't keeping up with traffic on a road, you should be on a bike route, imo.