Talking about e-mails, I wonder if it's possible to put a Spam filter on the forums... something that takes into account the time the poster has been a member, and then scans the new thread they have posted for key things, such as medical drugs, porn sites, long lists of links... and so on.

And they are either automatically trashcanned, or sent to a new, no-postcount forum in which people can ridicule the adverts and advertisers.

In fact, not trashcanned because the filter is liable to make a mistake and trashcan a thread that is innocent. At least if it's put in a forum it can be taken out and put back in the original forum it was in.