I guess I'll go against the grain and say yes.
I'm from Huntersville but my dad is from Texas, and since I was little he tried to sway me towards the Cowboys, especially since the Panthers weren't around til I was 4. I root for them to win every one of their games (except against the Panthers) as a #2 team but I don't follow them in depth.
I also gravitated towards the Broncos when I was a kid because I loved Elway and Davis, and to a young kid having a few teams to root for doesn't seem so outlandish - just like that kid for make a wish foundation who is from Houston but loves Cam.
Neither the Cowboys or Broncos are even in the same area code of the obsessive fandom I have for the Panthers, but I am certainly fans of those two teams.