Minor suggestion, if anyone has access to the site code still, and the filter can be applied separately to normal within-thread posts:

Disallow new threads without a title.

There's enough other reasons a post may get blocked, and that needs to be one for a thread starter. There's a remarkable number of them scattered around at the moment (certain boards seem to attract more than others for some reason), they're hard to click on especially from the headline list, and impossible to keep track of which one is which so if you're curious you end up opening all kinds of things you don't really want to. Sometimes repeatedly. Plus of course how do you even refer to them for mod reporting? Even if they only have to be a single letter… (may want to have a unicode filter to prevent various different types of spaces or modifiers being used in place of a visible, reasonably sized character of course. Or just demand a minimum of two to four letters…)