i felt the same way after watching FF thinking 'great every little kid is gonna be rocking flannels now' but even before FF they are pretty popular.
I don't give a fuck, always worn em, not gonna stop.
I remember the same thing happened with cammo cargos, I had a sick pair of winter cammos I used to rock, then every fuckin little kid and thier girlfriend started wearing it, again I didn't stop, but did have second thoughts when i saw a teeny bopper walking by with a cammo hairband