I can tell you 100% that alcohol in Philly stadiums cause more issues. They have talked about limiting alcohol to certain areas in their stadiums. I have lived in both cities been to numerous sporting events and alcohol takes it to another level. 99% of fans can handle it, but that 1% cant and that strips people of good time.The Cubs did that themselves with how they market the bleachers, Philly fans don't need beer to be complete ********. The fights at NFL games are isolated and rare, they just get blown out of proportion because everybody has a 1080p camera chilling in their pocket now.
Studies show that alcohol related arrests and police interventions go down when you sell beer in the stadium. Anecdotal, but you never see a completely bombed person staggering down the stairs to their seats at UNI anymore and it used to be a weekly occurrence.