<font color='#F52887'>I had the same trouble last year with a certain "RB" posting as me but a couple of people posted replies almost immediatly saying that they knew it wasnt me. Very sad that some people get their kicks that way.
This can happen on any board. A few years ago I was threatened with a libel case by the BSAC for a posting made in my name on the BSAC forum. (Problem was I agreed with the posting and within a couple of months what the poster put can true!)
If you dont like whats published in most media you can normally sue the editor and publisher as well as the author. But as a rule treats boards as light entertainment. Do not take them too seriously because there cannot be strict editorial control.