Many AN members, and others, proudly claim that they no longer use or carry cash. Others refuse to carry or use those annoying coins. Where are they going to quickly get 10 baht when suddenly accosted on the sidewalk?
How do you protect yourself in a situation like that? If you open a can of whoop-ass on them, they will probably be seen as victims and you will go to jail, or receive wrath and street justice from nearby adult Thais.