We had a similiar thing happen here, similiar dynamics, and those selected for arrest were young, fairly small, women involved in a combination antiwar/CM ride. This happened another time afterward also. It happened on the major state highway, and the cyclists were said to have been riding on the road, which, admittedly, would be dangerous. The shoulder is generally not bad on 101. Many people seem to feel that there was a overreaction on the part of the highway patrol, the DA wildly overcharged (imo) them, and the result is that it has become quite a cause celebre locally. It's a good example of why there should be, if possible, legal observers who can witness what happens.
The bicycle is the most civilized conveyance known to man. Other forms of transport grow daily more nightmarish. Only the bicycle remains pure in heart. ~Iris Murdoch, The Red and the Green