I caught a bicyclist riding on the sidewalk in downtown Manitowoc, Wisconsin, which was clearly marked as no bicycles allowed on sidewalk according to the symbol on the sidewalk. How does one miss that no bicycles allowed symbol? Here are the cities bicycle regulations.
I blame this on educating the motor vehicle driver only system. Every time something bad happens to someone on a bicycle, emotions take over at these bicycle advocates and it filters down to the people following them, often causing people/investigators to jump to conclusions.
Which in turn the cities/towns often start attack driving instead of thinking logically. All that emotional thinking that makes people react irrationally, and usually the results end up exactly the same every time which ends with an injury or even worse a fatality.