As I understand it, sidewalk riding is legal except in a specifically defined downtown area. Not that responsible, legal behavior seems to matter since opinions are so oblivious to actual situations.
We tend to paint with too broad a brush. There are so many evil bikers that I will never defend us/them as a class to peds. Neither can I condone blaming peds for most of the bikers' MUP woes, or the peds labeling even a perfectly responsible and legal behavior as an outlaw just because other two-wheeled demons exist.
Though I try to be neither, I ride like every ped is an idiot and walk like every biker is a jerk. Too frequently, I am not disappointed.