Bandwagon fans are the worst to those of us who put our blood, sweat and tears into our fandom.
Do we take fandom too seriously? Yes, but they don't take it seriously enough, and it's annoying. If you're not watching the team and caring about the team during the regular season, you shouldn't be able to flaunt your fandom during the postseason—or worse, when the team in question is on the cusp of winning a title.
Maybe the reason this is such a sore spot for me is that this bandwagon thing is especially prevalent here in Boston, in relation to my favorite team. In Boston, it seems that very few people even realize the Bruins exist until they're one or two games away from winning the Stanley Cup. Then, all of a sudden, everyone comes out of the woodwork as The Biggest Bruins Fan Ever.
Here's the way I look at it, though: When my team loses, it hurts me. Deeply. If you don't have to deal with the same horror when the team loses, you shouldn't be able to have all the glory when it wins.
Here are some of the telltale quotes to help you spot a bandwagoner.