Feallan said:

If they had his identity.

No one will take any legal action against him, because it would be dumb. Bad PR. He has publicity, and post like "sorry had to delete everything, Disney is after me" would generate shitstorm.

I don't quite agree with your optimism. Poking Disney isn't the same as poking Lucasfilm, even though there probably is considerable good will on Disney's side if they still haven't nuked this forum. Also, it's probably not difficult to find out who the guy is. There's a name in the youtube channel, for one thing.