Behavior profiling is a great tool that usually works to limit the unnecessary harassment of the regular guy. If you are doing something suspicious it's possible there will be a couple more eyes on you, however, unless you do something dangerous to others or yourself, or exhibit behavior that may incite dangerous behavior from others, you probably won't even know you were being watched. The TSA has a pretty decent hands off the quiet guy approach, but they have their hands tied because they can not search based only upon meeting a certain demographic or profile. This is why the guy that dresses up in a bullet proof vest, and carries 30 tubes full of sand in his carry-on gets the same screening as the 80 year old grandmother in a wheelchair. Our own "protect your public rights" groups make it so you get harassed when you're doing nothing, it's not the cops or TSA that do it.
Go somewhere like South Korea, Mongolia, or Romania, and try to argue with the armed officers in the airport, or on the street and it probably won't end well for you. If they think you are suspicious because you look like you are from the same group of people that attacked last time you WILL be searched. I guess what I'm saying is go to the superbowl have fun go home and realize that security probably watched you all day and never once interrupted your enjoyment of the event. They work so you can enjoy the game without wondering about how to exit the venue when a riot starts, or which places to avoid in case of an explosion. Don't worry about their presence and you will probably forget they are there.