Part of me thinks Fanning might have been likable had he started the "I borrowed this shirt" schtick, gone into the "I'm thinking of buying my own" as he was, but finished up pointing out that he didn't care for that one and preferred "THIS ONE," at which point he held up one with any Metallica cover art from Kill 'em All to Master of Puppets.
If you're gonna find sideways ways of saying "Fuck you," maximize the damage.