Anyone else notice an uptick in crazed drivers flashing their headlights in the left lane so they can go even faster?

I'm on board for the altruistic high beams flashing: Your lights are off, you have something wrong with your car, there's a cop ahead, whatever. Lately, though, I've noticed while on the freeway, when someone is already going faster than the rest of traffic in the left lane, someone else going at least 20 over, will rush up behind and bully them into moving out of the way with incessant light flashing.

Am I missing something?

Edit: It's not just me, I'm seeing it for other people, too, who are legitimately passing a series of slower cars, and someone shows up out of know where behind them