Unfortunate that it's abused, but that's the nature of online gaming. I've used it myself, but I always give someone the benefit of the doubt (let some time pass, a round, or some respawns) before using it. Due to the way it's being used by many, however, (constantly, on everyone who's away for less than a minute, people who stop to type something on a wall, on opponents in combat, et cetera) it should be removed.