I think we road cyclists get a little taste of what it's like to be in a minority group. The stuff I've had thrown at me, yelled at me and cars actually swerving towards me....after all that I can't imagine driving a car everywhere I go.
That's why I will always stick to the roads -- exerting my right to be there, but in a respectful manner. Peaceful demonstration is a powerful force. Martin Luther King Jr. was absolutely correct.