I wholeheartedly agree about the wholesale negative opinion having more of an effect on the "hater" rather than the "hated". So while it will often initially bother me, in the end I just end up ignoring it because it's like... ok, welp, good luck with that, I'm just gonna go back to what I was doing, which is working really well for me AND doesn't involve hating people I've never even met (bonus!).

But the quoted part of the scenario feels like a bit of a stretch to me... I find it hard to believe that someone wouldn't know that the people on a psychotherapy forum have therapists. We may not all love our therapists, but some of us do. That doesn't mean no one's allowed to say they hate them, in fact they sure are and I don't debate that, but I find it hard to call "I enjoy hating someone you love" a helpful thing.

ETA: and yes this way off topic now. Just trying to explain what it's like for me personally, but I don't want to harp too much.