The fact that so many people are arguing about one specific instance of pass interference the way they are just goes to show how difficult it is to make those judgments sometimes. Until we have computers capable of objectively officiating everything that happens on the field, there will be bad calls. Just like in baseball, the human element to the officiating is part of what makes it intriguing, whether for better or for worse.
I don't think the refs were out to get us, nor do I think the PI that got us that 1st and goal was a make-up call. It's easy to say somebody got screwed on a call or somebody got away with something when you just happen to catch it on TV or they show a replay. It's not always that easy when you have a split second to see it happen in real time and have another split second to decide whether or not it was legal. I'm not saying that excuses obvious bad calls, but I do think there are a lot of cases where people (hell, myself included at times) are a little hard on the officials.