Cloud
Super Freak
I don't remember him beating Robin, but he does lock him in the Batcave and leaves him to fend for himself (I think he even suggests that if Robin gets hungry, he should catch himself a rat). Batman gets all over Alfred for going behind his back to take care of the boy (Alfred, an ex-SAS agent, gives as good as he gets).
If I recall, Batman is conflicted about his treatment of Grayson. He claims he's trying to harden the boy the way he was hardened --- but he also acknowledges that he's a bit of an ass to the kid.
SnakeDoc
Yeah he sounds like quite an ass, but I could never hate Batman. Would still like to get that figure.