headvoid said:
I would question wether anonymous e-mails are really part of the debate. I could send a note to Uri Geller calling him a denier of science - doesn't mean he's won the bendy spoon arguement.
Calling someone a name without backing it up with valid points and/or counterpoints is a gesture of forfeit. You could be absolutely right about the guy, but you have to do more than that:
1. You have to demonstrate that you're right about his character.
2. You have to keep in mind that his character is irrelevant to the validity of his claims. Calling your opposition names is only, ever, for the benefit of the audience, and it only impresses the least-trained among them.
Sure, Uri Geller is either a kook or a con-artist. That by itself doesn't mean he's wrong. (Keep in mind, please, that I'm only running with your example; until someone proves conclusively in a controlled environment that telekinesis is plausible, I call bullshit on that one my own self.)
So does calling someone a name automatically mean they're right? No. Does trying to shut them up, or damage their character in the public eye mean they're right? Well, if they're wrong, those steps are entirely unnecessary -- so it doesn't mean they're right, but it's a strong indicator that they are, because it says that you fear the idea that people will hear and think about what they have to say.