Can't you just ignore the troll element in a thread anyway, McGrath? I find this constant obsession with trolls utterly puerile. The inference is that we are all automatically pre-programmed to retaliate, and that when we do, it's the troll's fault.

(Preventing guests from creating threads would of course remove a lot of the value of this place to those who may have legitimate reason for not becoming members. And many of the best threads would never have happened under such a rediculous regime.)