A curse filter? Hmm well i have an small idea that if any devs of the site would want to make his pet project i would be delighted.
Perhaps make the filter make any common curse words transform into an insult in the spirit of SSSS. So instead of the normal **** we could have "Trolljävlar" or something like that.
Just my late night ramblings. Ignore if it makes no sense.
My friend, if you can figure out how to defeat the *spam* filter, I will personally bake you a batch of cinnamon buns. You may have seen in the Bug Fixes thread that our host site seems to be over-reacting to terms that show up commonly in spam (but aren't curse words that activate the filter Eich was talking about) -- e.g. "pen!cillin", "Russ!an br!des," and "Oxycont!n."
Using any of those terms in a post or PM means the site just eats your text and burps out a 403 or 404 error code.
As far as your original idea about curse substitutions, I like it. But it'll have to get in line behind the technical problems.
Keep up with the suggestions, though!