Users of my middle-sized board asked to keep their content legacy online. So I read the source, replaced all the clean() calls in post.php and inc/mod/pages.php with some dummy code, and restored older posts and files from a backup. The board however became a little unstable. For example, post removal requests are never answered by the server now. Removal itself still happens though. Only vichan was tested, dunno if this is the case with its parent tinyboard. By the way, any board powered by vichan somehow automatically becomes a target of hard-to-evade CP spambots.