I'm looking for a term that describes when a person is pretending to be offended in order to end a confrontation. The key here is that the offense is perceived only because the person wishes to use it as leverage to leave the discussion.
Below is a poor example, but it's the best generic one I can come up with:
A: [Does action].
B: I think it's mean when you do [action].
A: You called me mean! We're done here.