Hardly the crime of the century but I hope Pardew has given him a good talking too. I know their ballboy was being a dick (I wish ours were a bit more like Everton's if I'm honest) but he should know better. That said the matter should've been closed when Cabaye went over to the lad at half time and apologised.
If Cahill's hissy fit was because of this incident then I really think he needs to take a look at himself too. It'd been over an hour since it happened, the referee had dealt with it (not worthy of a card, which shows how much of a bloody non-event it was) and no other Everton player seemed to be that upset about it, the last thing the game needed was that nasty bastard stirring shit up again.