I went to FSU and still live in Tally. I'm typing this as I'm literally wearing a green UM polo. I rep Miami **** near every day.
I tell people this all the time when we talk allegiance/college ball.
If you went to a certain school, be it UF or FSU, wherever, and you want to bleed those colors, that's totally fine. I don't care where you grew up. If you graduated from UF and wanna rep the gators, nobody can tell you ****.
HOWEVER....the flip side of that is also true. If I grew up in South Florida (as I did) and lived and died with The U, and I still want to rep The U even after attending/graduating from another school, you have every right to do so.
I'm old, but I've found it to be like this in the VAST majority of cases. For the vast, vast majority, it boils down to how rabid of a fan were/are you. If you grew up in South Florida and either cared very little about Miami or were a casual fan, then most of the time those people "convert" to where they go to school.
But if you grew up in SFL and you were an obsessed, maniacal, lunatic Canes fan...you're not just flipping your allegiance. It doesn't work that way. Or ****, it shouldn't. If you have this **** in your blood like I do, and like a lot of people in my same situation do, you don't jump the fence just because of where you went to school. I couldn't afford to go to Miami. And I had a GREAT time in college, away from Miami. But no school, money, alumni association...NOTHING could ever pull me away from being a Hurricane.