I have to agree with a lot of what has been said here. It is a private forum. There are set Guidelines and what's acceptable that you agreed to when joining (that's pretty much a standard fare for any private forum). And because it's private, free speech doesn't apply. If the mods think that you have overstepped that magical line then they can toast you.

That said, no one is forcing you to go here. You don't like it, use the door and leave. There are a lot of bicycling oriented forums and newsgroups. And, as has been suggested, you can start your own (it's pretty easy and can be cheap with some of the options out there).

So suck it up and deal with it.