I havent noticed a difference in fan behavior in the 20 years ive attended games. I have noticed a difference in security, They seem power hungry. Ive seen people thrown out for high fiving after touchdowns. Cheering as they are walking to and from the bathroom. A guy was arrested after security accused him of smoking when he was chewing on a straw. A bunch of people were thrown out after defending him. A fan was slammed into the wallafter saying heyyy ayy ayy ayy while he was being escorted out. Dont get me wrong there are drunk people swearing and spilling beer all over people, fights and things I wouldnt want my kids to see. But security has been over the top the last few years.