Crowd has definitely changed over the last decade, unfortunately for the worst, more people who shove through crowds. There also seem to be a lot of younger people on the Polo Grounds also. Too many spoiled children who's parents don't know how to shut them up when Jay Z is in town.
"OK, here's a ticket, a condo and $500 for whatever, now let your mother enjoy her xanax."
The Bro Factor has also increased substantially, most likely an extension and far more dangerous version of the spoiled suburb child.
I remember being able to have a conversation with someone on the Polo fields, now its untrusting glances that believe I'm out to get them.