I genuinely don’t understand this rhetorical tactic. “We haven’t seen any proof” - do you live here? Some of the MUNI buses are fitted with cameras that automatically snap license plates and issue electronic tickets to your car, just like a red light camera does. For crying out loud, the linked article says “This might not anger San Franciscans so much were it not for the fact that the MTA does enforce its laws, harshly, against individuals. Several speakers at the hearing had received tickets for the same behavior Google buses get away with daily – pulling into a bus stop to drop someone off.” SF parking regulation enforcement, particularly in primo areas, is swift, harsh, and almost impossible to contest.
And your assertion that the protests were a reaction to talks about charging the shuttles doesn’t hold water. Anger has been building over the shuttles and what they represent for well over a year. Mayor Lee and MUNI just opened the subject of charging the shuttles for stops a month ago.