Sure. Miscalls do happen. Its all a part of the game, human error and all that. For example, no-calls sometimes happen because the ref didn't see it. Amidst the chaos of 22 players running around not the field at the same time sometimes will cause that. But that isn't to say it happens as often as most fans of pretty much every team say it does.
To me, it seems like a lot of people let emotion get the best of them and in the way of logic, and get mad and blame the ref automatically. And its pretty hard to argue intention, for those who say the refs intentionally do these things (or don't do) for money or whatever. Trust me, they get paid plenty by the NFL and all these years you'd think someone would've been caught somewhere. Besides, I doubt any team has the kind of money to pay 7 people enough to make them throw a game.
Its all too common for people to think the refs are out to get their team. And PATS fans are are far from the only ones to think so. I think people just don't want to admit faults when they see them. I mean, I understand trying to be optimistic, but there's a difference between that and being blind.
Besides, in the grand scheme of things: Its just a game. A fun one to watch, sure, but its not like our lives are depending on a win (at least I would hope not)