Bungie has cottoned onto the fact that some Halo 3 players have been taking advantage of the game's file sharing facility to distribute pornographic material.

In a statement from Bungie, the developer has vowed to take harsh action on those who are caught with, for want of a better phrase, their hands down their pants.

Players caught will be banned from the Halo matchmaking service, banned from sharing content and banned from playing Halo 3 for one month.

"Users who have modified content on their File Share - regardless of who created said content - will be subjected to the full power of the Banhammer's thrust," reads the statement.

"This includes some never-before-unleashed technology that will effectively terminate your Halo multiplayer experience online in every imaginable facet. In fact, the ban is so thorough that simply calling it the Banhammer is a complete understatement."

We guess that means that setting up a new account won't work either.