this comes to mind:
http://rationalwiki.org/wiki/Concern_troll
"I will spend most of my time and discussion worrying more about the specific phrase you used, and being offended by it, rather than all the other substantive arguments you bring up"
Coincidentally, this tactic is often used by members of a priv...er, domina...er, majori...um, "traditionally enhanced" social class (rich, straight, white, Christian, male, etc.). Sometimes concern trolling is by someone who actually does feel genuinely concerned ("That hurts, why can't we all just get along!"), and sometimes it is just to troll, but either way, the effect is the same: discussion of
actual, historical and substantive harm is sidelined, in favor of long discussions over the "rules" of "proper" debating.