So, I have an idea for a thing, and a forum would be a good way to do it. But for various reasons (the forum would involve some topics for which it'd be important to be able to keep people from connecting two different posts as being from the same poster. And this would be common enough that I really don't want to make people make several accounts. So what I'd be looking for is a way to let users pick one of several pseudonyms for each post/message, and have there be nothing (not even things like uid=N in the html source) which reveals the base user to non-admin types. And I am wondering if this is something someone's already done. I'm also wondering if I've missed something that would give slightly more detail on what's involved in writing for this; like, I see a requirement for PHP, so I assume the software is in PHP, but I don't see anything very specific about that.