There are plenty of domain registrars who will sell you or anybody else a domain name so you can create a site where you can talk about whatever tickles your pickle.
Now I'm going out on a tangent and say your reply proves you have a lot of interest on alternative chains. Being yourself so interested why don't YOU create your own alternative chains forum and leave BitcoinTalk for Bitcoins, like it should be?
I'm sorry but this forum policy is that we're allowed to talk about alternative chains. I'm not saying that I agree with that policy but it is how it works.