Trolling is utterly pointless and I think it is too much to expect the moderators to jump in all the time to stop it. Rarely, I have had some very critical posts about me and it is unpleasant, but we are all big girls and boys, so suck it up.
It is a good idea if other people on the thread, who haven't
been trolled, tell the poster to put a sock in it, or get off the thread. Everyone has a right to be wrong headed, I am sure I am most of the time.
There was a great notice up in Richer Sounds, a budget UK electronics company, which said.
" The customer is always right, even when he is wrong, the customer is always right."