>>19247
Even if your filters are really complex and clever and are designed for every possibility of evasion (swapping identical cyrillic and latin letters, additional spaces, additional symbols, zalgo text, etc) as soon as you publish them for other users to install as a userscript or as a part of an opensource imageboard engine, they will be out in the open, for the spammers to see and think of a way to avoid them.
Or he'll just wipe with copies of legitimate posts from the thread, as he sometimes does already.
If you really want to work on something useful, implement this feature of dollchan into lynxchan/magrathea, so that even people who don't use dollchan could auto-hide deleted posts.