[fjin]

If messages are going through mud server, then it would be easy to replace certain words to others, or based of few keyword in messages it sends another message instead.

* "I have serious troubles to different what's fiction and what's reality - I have been told that this game is all about fiction and enterntainment but I feel this is very real."
* "I want to get banned from this game"
* just word replacing can get interesting ones "Jesus" -> "Satan", or just one of the game's god names.

Misbehaving in Game would also set Wanted or similar status in game world - perhaps even reward of killing that particular character.

Trying to proglaim real world religion in game world would transfer that player character to "enemy" of that particular area ( as well known example: to Orc in Rivendell , or to Noldor in Mordor ). If those religion freaks are persistent, they would make up very good mob.