Yeah, you're right.
These new folks, barely know us, and start to go around passing
condemning judgement. And then, go all wide-eyed and teary when we
show them that they were wrong in insulting the very folks who
tried to make them feel welcome in the first place. 
Isn't it just common-sense etiquette to just quietly walk away if
you feel in the short space of what... three days?... that you
won't belong to the group? 