I've done Castrum Meridanium a few times now. Not as much as others (seriously, why is it such a popular place to grind? Do the people who grind that place suck at every other piece of content?), but the primary reason I avoid it whenever possible is because of jerks like that who pick on rookies. It's disgusting behavior.

I definitely recommend hopping onto Party Finder with this to weed out the jerks.