The whole April Fool's message board language filter thing might have qualified as minutely clever a few years ago, but it's so utterly common these days that to even call it boring would be a compliment. Even if you find it funny once, having to read an entire filtered forum is like having to listen to someone tell the same (lame) joke over and over and over and over and over for an entire day.
The point of April Fool's is to fool people, right? If the only people you can fool are idiots or people who don't even know about April Fool's day, that says something about the quality of your prank right there.