Some German neighbours of mine told me about this remarkable man, Michael Hartmann, who confronted truly horrific levels of pavement parking in Munich by ‘car walking’ and then went on to challenge motorists sole right to the road by waking in the road to slow the traffic.. Strong stuff!
He started this in 1988 and it resulted in numerous arrests, time in jail, time in hospital and being sent for psychiatric testing twice. He responded by saying that he wouldn’t stop and that he was the one who was sane! He also got a lot of publicity and was sent many letters of support. Make up your own mind!
The pavements in Munich seem to be pretty clear of cars now as far I can see on Google Streetview.
Here are some links:
Pedestrian Liberation 
Do you know how the car-mentality in Munich was eventually reversed?
No I don’t. Would be very interested to hear about that.