Hi Peebix,
all thread titles are subject to moderation.
The aim of this moderation, however, is
not to change the meaning of the title, but rather to make it a clearer description of the subject matter of the thread. Titles are also cleaned up to fix spelling and grammatical errors.
Currently the system does not allow for an "edit history" to be viewed. That is, if a moderator edits a title, there is no way for other readers to view what the original title was nor who made the edit. A "title edit history" feature is in the works and will be implemented in the next few weeks.
The content of posts themselves are very rarely, if ever, modifed by moderators. Only reasons would be to remove cases of extreme abuse, like the posting of pornography or hate speech. But in those cases usually the whole post would be removed, not just edited.
As for banning, you're definitely not going to be banned for a minor infraction such as removing a post. Yes, self-deletion of posts is against the forum rules, and you might receive a warning if you do that, but a ban would be excessive. Sorry if you were told otherwise by another moderator, I think that was a misunderstanding.
Things are a little unclear regarding moderation policy at the moment, what with the recent
transfer of the site. But we'll sort all that out in the coming few weeks. We need a fresh page that clearly lays out what the rules and guidelines are. The rules won't be all that different from previously, but they need to be specified again clearly in an up-to-date way.