I have just been able to read this thread now, as I can't do it at school. The pge13 filter may work for me personally, I don't know as I cant test it till back in school. I have used mudcat as an example of a discussion forum and would think it a shame if it was not open for students to discover the wonders of mudcat.

The problem with the opt in filter is that obviously you need to know about it to use it and so these thread titles can still prevent people from discovering the cat. A more reasonable version might ne that you have to opt in to the profane option; a top shelf as it were so that the default settings do not lock out new or inexperienced users.