It's a simple thing to turn your chat filter off in Champions Online.

Simply right-click on the main chat tab above your chat window, click Options on the menu which appears, and then uncheck the chat filter option.

You'll have to do this with each of your characters, as the function isn't global (yet, at least) but it can be done.

Now, for those who _do_ want a chat filter, but want it to censor different words than it does now, that's a different problem, and I can't help you there.