I was thinking a neat feature would be to allow per user to have the forum PG or not. Kind of like how some video games you can toggle the 'gore' on/off.

Each user has it set to "Keep it PG" upon registrering, but can later uncheck the option via control panel.

In the replace word filter, each word can have a toggle for it to be optional or force replaced. This would be for some of us who use the replace word as more than just a bad word filter. I use it to replace certain abbreviations for example.