The more flippers that show up, the more liquidity in the market. You'll get a tighter bid-ask spread.
Of course, the old shares held by insiders don't like to see them. They don't like competition on the ask, because it forces them to hit the bid to cash out. Once those guys start to compete at the bid, things fall apart fast. That's what crushes micro-crap. Not the traders. It's a pinky myth that the traders kill a run.