Yes, according to a few incensed forum posters, hackers have allegedly found a way to augment the amount of experience rewarded for killing them. Instead of the usual 50- or 100-point increments we usually see, these dubious players can punish their murderers with negative five million points, dropping their hard-earned rank back to level 1. Check out a NSFW video after the break to see this horrific new exercise (which appears to only be happening on Xbox Live) in motion. We've contacted the folks at Infinity Ward to find out what they're doing to crack down on these total Borfs.
[Thanks to everyone who sent this in!]