I’ve posted on several different characters during my WoW life.
I’ve never had anyone send me hate mail or whispered to me in game.
I’ve never had anyone ask, hey are you that person from the forums, either.
When at home or on breaks at work, or just simply bored at work I spend my time reading the forums. I recognize lots of names. But never tracked them down in game.
I was part of a large guild for a long time. While on break from WoW I was removed because of inactivity. Understandable. It was during this time I realized I had been watching a (now former) guild mate on twitch and on podcasts. No wonder every one was excited to see him come online in game. I never said hi to him