You gotta remeber that Atmuh likes to start out as a low pressure front. Then over time he will evolve into a dram hurricane that he personally derives pleasure from.
In short, Atmuh is just being Atmuh. It's kinda his thing to act immature.
I am in no way saying that what happend should be allowed however. If he was doing it with the sole purpose of making his team lose, then that is team griefing like Bahamut said.
The point is this: if you are playing a team based game, and are hurting the team dynamic, you Matt Watts will end up with a stapler in your eye!!
Edit: I had a pic to go with this to make the joke funnier, but it isn't working.