We already do that with our monthly lunches/dinners/picnics.
The fact that you want to relate us to the violent whackos that make up Critical Mass is more than a little disturbing to me. I'm sure you heard about the man that was attacked by them for honking at them when they blocked his right of way at an intersection. They're lucky he wasn't carrying a firearm, as he could have killed them in justified self-defense. I'm sorry, but if you're breaking my car windows with a bike lock, you're threatening my life and I'll do whatever is necessary to stop the threat.
Edit: oh, and as for walking around, most of us do that on a daily basis already. We go around OC'ing doing our daily activities and not trying to cause a fuss. Many of us just want to have the ability to go armed while we go about our business. Some of us are also into the education aspect of it and find OC a great way for people to think to ask about the laws that they may not have thought to ask about otherwise.