i have even seen where MMs close the stock very low on opx, to wipe out all the calls, then spike up monday morning before the market opens, so that ppl with puts in the money have to cover with a big loss. MMs win on both puts and calls this way.... its all a scam.
yes, they do it all the time! nothing magical about "max pain"! Look at lnkd ... closed out last opx with all calls deep in the money, and all puts dead! This thing aint going to 485 by tomorrow! forget it