For Future Reference, When Did You Feel A Line Was Crossed?

A question for the floor: I want to hear about your fannish final straws.

For example, the Bucky Barnes name-drop was what prompted me to unfollow a couple SHIELD-heavy blogs and blacklist the more specific versions of the show name**.

If you can remember, please tell me about the specific things that made you quit and/or start to blacklist a show.

**Or at least, I tried. Until I realized that pretty much every variant of Marvel's Agents of S.H.I.E.L.D that people actually use tumblr-saviored a bunch of posts I wanted to see,especially now that Sif is going to be in an episode, which, needless to say, I am actually kind of bummed about.