facebook fan-addict
A Facebook fan-addict is someone who joins pages just because they think it makes them look cool. They're like a kid who wears a hat that's way too big.
'I joined 'The Life of a Hat' because I thought it would make me look cool.'
My friend joined 'People Who Think They're Smart' just to prove it.
I joined 'The Secret Life of a Sock' because I thought it sounded interesting.