Known many people/fans that actually did that, converted allegiance?

I have.. many actually. Probably my best friend (RIP), could switch at the drop of a hat. Seriously, I saw him switch mid-season before.. more than once!

IT used to drive me nuts... because not only would he switch, (always to whomever was winning the most), with a straight face he'd try to convince me that he had 'always been a fan'.

And before you say it... sure, He really wasn't a 'team' fan, of anyone.. .he was a football fan, however. Loved the game.