Morally, I'm sure we could come up with plenty of good reasons.
Realistically, ain't gonna happen.
Remember the story a few days ago about the leader of Sudan having a warrant for his arrest.
Chad was supposed to arrest him, they didn't and no one will do anything about it.
What about the short war between Russia and Georgia.
If Russia is found to be in the wrong, no one will do anything about that either.
There are lots more examples like Pol Pot retaining a U.N. seat until his death in the 90's.
World justice is a matter of convenience.