Beatings are reserved for dropping YOUR Blackberry. Laughing is for after she drops her BlackBerry and wants to use yours. Leaving, after beating, is for after she drops hers, gets yours and then drops it as well.
While Berry abuse is not something that should be tolerated, as long as it's not your Berry it's much easier to handle. Oh and if it was a gift from you, you know who not to get nice things for.
a) if the dropping of the BB was intentional its a straight beating before leaving
b) unintentional dropping, just a slight beating (I suggest the donkey kong move)
but dont leave her, she could be useful for RIM downtimes.
c) in any event - sit her down and explain to her exactly how important the BB is to you and the relationship - from this you can take her reaction and based on your judgement beat/leave her anyway.
*I do not condone physical abuse.
*no BlackBerrys were harmed during the making of this post.
Beating would be letting her off easily. Chain her in the basement for a few days and only give her water. That will teach her to mess with your better half