Cheating isn't rampant, because SE would crack down on it immediately like they just did.

Nobody shouts profanities, because they would get reported for it, but there can be tension sometimes, often just over eachothers' actions. In The Feast (the PvP without objectives) you actually can't chat.

I personally find PvP really fun, but you will find a lot of people like to say it's boring.

You can do it from level 30, so you can queue for it right now and see if you want.