If an individual is reactively buying and selling based off what...

If an individual is reactively buying and selling based off what some stranger is saying then they really don't have a clue.

That's what these dogs rely on - spooking somebody with their negative sentiment and picking up some stock for pips. Some play a longer game with a continual wearing down over weeks. I've seen people comment on HC that they've let their stocks go because of such concern. It may be small bickies, but you'd be naive to think it doesn't happen, or worse, organized groups pay people to be Hot Copper negative Nancie's to drive a price down, or at least hold it back.

Then there's those that make a concerted effort on here, like this bloke: