The importance or not of learning grammar, classical Chinese and other random things

[Hofmann]

A lot of native speakers stop posting when they find that they can't do much besides use the language. I'd find no value in participating in an English learning forum.

[roddy]

Did he unregister or get banned?

Well, there's no way for users to unregister themselves, so the latter. Not going to get into a discussion on individual cases (pm an admin if you're REALLY interested), but if you're new, posting at a rate of knots, and ignoring the T&C's (linked at registration and under every reply box), it's probably bye-bye.