There's always been drunks and as Rockpile said in another post, it goes back to the War Memorial days.
I've been coming to Rich/Ralph over 30 years...went to the opener back in '73...and while there was always a party atmosphere, it seems like the drunks these days are alot more vile than 20, 30 years ago.
I was at the Jet game last year and while there was the usual shenanigans, it seemed like everyone took everything much too personal, there was a lot more "In your face!" incidents than I ever remember, many of these incidents between Bills fans.
The mentality seems to be, "I paid my $45 for this ticket and I'm entitled to do anything I want for the next three hours, and if you don't like it, go F yourself!"
I'm afraid that mentality goes far beyond the reaches of the Orchard Park police and stadium security.