Why is there a fliter for words on JCF when it's never used.

For example, I write a swear word in the middle of a sentance or something.

So these **** little friends come into play. Fine.

So why do they need to be edited again? To (/) or stupid in the middle of my sentance?

I'm sure others of you have had this problem? Maybe someone understands why...cuz I don't.