In this vid clip of a panel from Comic-Con, Misha Collins mocks that certain fannish mindset that fears, or even takes offense at, celebrities taking an interest in (or even verbally acknowledging) fanfiction about themselves.
"Isn't that weird though? We're not supposed to talk about it - well, I don't have anything further to say about it, but still, it's - people will get upset: 'It's our private thing that we do... about you.'"