I think it is very rare to get a troll on Gransnet. In fact I can only remember one, and that was quite obviously a schoolkid. I think it was at the start of the summer holidays last year.
No one can really ever prove that they haven't name changed to post something controversial, but I DOUBT IT HAPPENS! Most Gn's would be quite comfortable to say whatever under their usual name.
I think the post that was deleted the other day was more likely to have been a lurker who suddenly decided to say what they think.
Stop being so flippin' suspicious of other people,
Being quizzed by chemist's assistant in Boots.