Sadly the subject attracts certain kinds of crappy people, and the mods have had to take increasing measures to keep banned people out. I think the requirement is a working email address and waiting for a cooldown of some length to prevent banned people from just instantly making new accounts. If you can't post for a very long time, try contacting the mods? There should be a "contact us" link at the bottom right of most pages, that should go to the mods and be available?