Of course not, but he is a trouble maker regardless. I was just using Camo to highlight Lippi's double standards policy. He cites petulance and potential creation of disharmony as being a reason for not choosing Cassano, Balo, and even Totti, but yet has chosen one or two volatile characters who can cause problems.
We see these guys on the pitch, but there is something we don't see and that's their locker-room, off the pitch behavior.
I don't want to find excuses for Lippi because I too wanted at least Cassano to make it, but we can't pretend that we know the relations between players. I remember that Cannavaro once (and it was recently I think, a year or so ago) said something about Cassano's negative influence and we can all assume how the other Azzurri players think of Balotelli (I guess that the little punk insulted all of them during matches). I guess Lippi is trying not to disrupt the harmony inside the team and when one talks about problematic players I think that's what he has in mind.
Cassano did change his on the pitch behavior, we can't say that he didn't. But we also don't know his relation with some Azzurri players. If Cassano insulted or was involved in a fight in the past with some of the Azzurri players, then that might reflect negatively on the whole squad.
With Camo we can at least exclude that because we know he's a good friend of most of the players going to South Africa.