It's actually quite simple to do the math in order to see what persons score have been glitched. First: look at their best killstreak, then: look at their most points per round. Then do the following math: one person on 4000 points yields approximately 100 points, compare that to the given number of most points per round, 4455, and you'll realize that it takes 44 people at the level of 4000 to give someone that prepostrous amount of points! it is not even possible to do that!
And to those unfamiliar with the rising problem of glitched scores: it's a glitch that involves the victim killing a person, and that persons score freaks out and becomes insanely high, so that the victim gains extreme amounts of points from killing that one person. This person may be just a lowrank, and as far as i know, the person will not even know what happened, but the victim gains the points yielded when killing someone at the level of ca 20000 points!