User blog comment:MyOpsAreBlackerThenYours/How to be a useful Recon in BF3./@comment-1476628-20120613082016/@comment-1990578-20120614174817

Yeah, pretty much about half of all 500+ SPM players on PC have aimbots. The problem is, GGC Stream and PB can't detect them since they're client-side or something.

There was a guy on Reddit who talked about it a while ago where he explained a bunch about how one of the hacks worked since he used it to understand it. I don't recall exactly how they work from the post, but apparently they're almost commonplace on PC.