Who cares if anyone changes their minds as a result of an adult, rational discussion? And if you truly believed that discussion was pointless then why have you posted to this thread several times? I can say that I have personally changed my mind about a couple of things as a result of discussions on this site. The views of others have enriched the ones I already had just as other's knowledge of snakes has enriched what I already knew about them. Discussion and arguement is how we learn things, only the truly closed minded will only express what they think and not acknowledge the thoughts of others. But we aren't talking about the usefullness of debate, we're talking about whether certain topics must be forbidden from being discussed. I'm saying it isn't necessary, in fact it's impossible to actually do this and what is truly needed is a ban on personal attacks not on debate itself.
I feel a little light headed... maybe you should drive...