A good friend of mine who has been a moderator for several blog sites passed on this good advice:
“Don’t feed the trolls”.
If you suspect that someone has entered a TROLL aka FAKE forum topic – Don’t bother to respond in an upset way OR a kidding way OR any way at all.
Whatever you write is just feeding the troller.
They are getting what they want. And YOU are most likely wasting your time and/or letting your blood boil. PLUS – You won’t change their behavior.
Please think about this suggestion and just avoid them.
Many good blogs have broken down because of Troll feeding…. and the subsequent infighting it can sometimes spawn.