LOL! With posts like that, you should work for Senator Conroy and ACMA's big black list of websites that he wishes to censor.
On a serious note, it pretty obvious which 4 letter words are going to be allowed and not allowed. If you are not sure, then just go over to your Grand Mother's place for sunday night dinner and try using those words at the dinner table. If she does not hit you, then the word used should be okay.