I can't tell if you're joking or not, but hell is just a place, you shouldn't be offended by it. It's apart of your religion. (Assuming it is your religion because you were offended by "hell".)
Now giving my opinion on the topic- I think hell shouldn't be blocked in the first place. It's not a bad word, there are a few words that I think shouldn't be blocked, like H!tler. He was a person. Not a swearword.
There are some glitches in the profanity filter, like I was typing a normal message about pvp, and it said "Don't say profanity" or something like that, and the message had nothing bad in it.