The pump and dump is pretty normal in this market, it has been happening in the past and it's still happening now.
Exactly, it's very fraudulent, but we can't do anything as this has been practice since the inception of crypto trading.
Overall market status is still good so this really does not affect negatively to the market in general, maybe only newbie would loss their money because they'll do panic buying and panic selling, which is a dumb move.
It has pros/cons along the way. Maybe because we are in a bear market that's why we haven't heard a lot of negativity about those pump-and-dump, but rest assured that when we're in a bull market, they groups are going to flourish again. Lol.