In my personal etiquette system, things should go both ways; individuals may have certain behaviors they should engage in, but the group is not off the hook. Failing to flip the service for an off-handed person is just as much a faux pas as anything else.

Etiquette often has its reasons, so I'm actually not annoyed at etiquette per se anymore, but I'm still annoyed when the rules trump the spirit. I'm very much a "spirit of the law" sort of person when it comes down to it.