So what? Being a citizen is not a license to do whatever you want. Nobody argues that people should be able to ignore posted parking restrictions when it suits

So what? Being a citizen is not a license to do whatever you want. Nobody argues that people should be able to ignore posted parking restrictions when it suits them. Yet the negative externalities from people camping and living in their cars are way more significant than from parking in a loading zone or not paying the meter. Just ask anybody who lives in a neighborhood with a significant homeless presence.