I agree for the most part. MM don't have positions here, but they often hide orders to move the current sentiment on pricing. They know people will take a few ticks here and there and they will set it up to manipulate peeps when they see an opening. Only time they don't do it at all is during a big run (up or down) as they don't usually have time.
I'd say they could be blamed about 10% of the time that boards blame them. Lol