Not sure how you deduced that I was implying "nefarious groups" aren't. If a trader bought at the top, that's the trader's piss poor decision because they actively made a decision to buy. I know all of us have made the mistake; whether a penny or blue chip.
This is from my experience with biotechs. I was implying ass-clowns that short the stock intensely for a brief moment in time to knock out stops and scare people just so they can go long once the PPS has tanked. Usually because they have insider information about a drug getting approved. Yeah, I agree, there are criminals on both sides. I was only referring to this particular aspect of criminal behavior.