They're Boston fans. Prior to 2004 they were relatively sympathetic figures, but there's a reason things like Tawwwwmy from Quincy exist. They are horrible people and on top of that have become horribly arrogant sports fans. This has always been the argument for idiots regarding not wanting the Cubs to win the WS. I could see Cub fans becoming pretty arrogant after some success but when it comes right down to it, if the Hawks, Cubs and Bears all won and Chicago became the new Boston I'll gladly take all the vitriol that the rest of the sports world can dish out. I think this is a possibility, if the they all won and won frequently. But the difference is that Boston truly has some of the worst people in America. Think of all the worst NY stereotypes, but with none of the influx of other cultures, foreign and domestic, moving into the area to offer respite from the scum. You just described Philly. The idea that there's a group of people worse than the denizens of Philadelphia is the stuff of legend. It's like that first Viking that said "Let's try sailing west". I'll defer here though since you live between the two groups whereas I (thankfully) never come into contact with Boston fans.