To me, there is a bit of "glory-hunter" in all of us, it's just that there is a spectrum. The great majority of FR users are fans of extremely successful Clubs (perhaps currently or traditionally). I don't see many for Ipswich or Plymouth Argyle fans around. Except for the few users who actually support their local club and whose families raised them to support said club, most people come across the club they will eventually support via various media outlets. This, in it of itself, is not an evil but a natural result of people worldwide having more exposure to clubs that are more often aired on television and participate in tournaments.
Like I said there is a spectrum. Some people become fans because of a club's ethos, history, playing style, etc. It may be that the club we choose to support happen to be successful but there is more to it than that.
However, there are clubs that do have a higher proportion of what I would call complete glory-hunters. This is your fan that jumps around from club to club based on whose winning the most. The one that cares to know little about the tradition of the club and just wants to watch the next super-star work his magic. I hold a personal belief, as do many, that Manchester United have a SIGNIFICANT percentage of these so-called "complete glory-hunters" but that doesn't mean they all are. IT would be a significant injustice to overlook the born-and-bread Mancs who have suffered through the barren years and relegations of United in the past. These most certainly are NOT glory-hunters.
In short, even if we have a bias towards a specific club or fan group, we should learn to appreciate that we are all still linked in our love for the beautiful game.
i told 3 friends of mine what team u support they all said man u. i said name 3 players 2 of them just said rooney and van persie the other knew 0 players.what dumb glory hunters. they support man u cus people mostly support themi ask people who know about football who support man u have you ever went to old trafford they said no that means nearly all manure fans are glory hunters