Up until I retired in 2012 the city paid me a lot of OT to go to the Marathon, Fourth of July on the Esplanade, and a number of "rolling rallies" for the Red Sox, Patriots, Celtics, and Bruins. BTW, the Bruins crowd was both the largest and rowdiest.
Guess what I haven't gone to since I retired?
Crowds make me nervous because in many cases crowds can turn into a mobs and that means a riot. Case in point being the celebration after the Red Sox won the World Series in 2004. Not the parade, but right after the victory.