I've played a lot of arrogant PCs (What can I say, if I wanted to play nice I'd do it in the real world

) and none of them would accept this kind of behavior from mere commoners. If they started pulling some of these stunts my PCs would at the very least slap them around a few times and leave them to their fate, letting the real villains take care of the ingrates. (Of course that doesn't apply to 1st level PCs who don't really have any reason to be arrogant, at least not based on their level)
Thoughtbubble has the right idea, at least when the PCs have a few levels under their belts. Commoners in most settings do not have a democratic or anarco-liberal mindset, they are the lowest ranking members of society and they know it. They shouldn't provoke the PCs, and shouldn't take action against them unless the PCs become an obvious threat and their nobles/protectors are not available. There aren't that many 18th level commoners around, and you don't piss in a persons soup if it can get you killed (or at least badly spanked).
If you want to punish the players do it in a plausible way that is consistent with the setting, otherwise it will just breed resentment.