I know its been discussed before on this forum. Each time I see the Colts play their home games on TV, my buddy and I always see the lower-level seating fans just sit through the entire game. Im pretty sure the upper deck seating fans are the loudest at LOS
I know that they can do whatever they want but it still upsets me that they dont cheer loud and proud for our boys.
I know if I was there, I would have security have to shut me up because I would be so supportive and happy for my team and go nuts on a 3rd down play for our defense.
Go Colts! 
I'm a long time season ticket holder and I've actually had people in front of me get annoyed from me yelling during defense...One thing I want to point out, Cory Redding was ticked off in the first half at the crowd in the club seats because they were all "sitting on their hands" during defense and he noticed it too...He came off the field one series and said "where were you"!!! I've always been a huge advocate for getting as LOUD as you can during defense no matter what down it was but there are always going to be people that don't because it's more of an entertaining event to them instead of a knock down drag out gladiator sport. You also have alot of families with kids and normally the parents aren't going to be getting up obnoxiously yelling because it might "scar the kids for life,

! But anyways, "it is what it is" and it'll never change, also, there will never be loudness like we had in the Dome and I think alot of people have backed off for that reason alone...The good ole days of actually feeling like you're blowing the roof off the place are gone but we can always keep making the best of it so let's all hope for more passionate LOUD fans...
Keep in mind, I do not care if I have incorrect spelling and grammar so no need to correct me, get it, got it, good!
GO COLTS!!!