[Raiu-Ayu]

I think it depends completely on the situation.

For example, in the KAT-TUN situation, personally I think that Jin left purely for selfish reasons (I've never really liked him to be honest, too full of himself) and because he was simply, I think, bored with KAT-TUN. In that situation I'm likely to back the group because one member is being selfish.

Another example is when Yukari Goto left AAA. As she had to leave the group for medical reasons and later focused on Gravue modelling I support both AAA and Yukari because it was neither sides fault.

Final example is when Keisha left the Sugababes (UK based group). It came out that Keisha was forced out of the group by her bandmates so that the record company to change them to make them 'fresher'. In this case I support Keisha