It's a passive-aggressive form of attack based on psychological projection. I didn't realize what they intended by it until I read an article by a mentally ill individual who had attacked me once or twice that discussed some of his experiences. But basically, they are assuming that their weaknesses apply to you and they are attempting to play upon those nonexistent weaknesses in order to try to send you into a psychological tailspin.
In other words, it is a MUCH nastier attack than it appears to the non-Gamma.
Now, this tactic is foolish for two reasons. First, higher socio-sexual ranks are not susceptible to such attacks because they have very different psychological profiles. In fact, the effect on high-rank individuals is likely to be the very opposite of the one intended because marginalization and minimization are tactics that are used to MOTIVATE high-level performers to even higher levels of performance, it doesn't harm them in the slightest.
Second, and more important, use of the tactic tells the target that his attack is very likely going to be highly vulnerable to it. And turnabout is fair play.