Cats are evil I tell ya, I swear mine have some seceret lab somwhere. All they do is plot to destroy all the bathroom cutrians of the world. Just devious.
But Geoff looks so happy with Isaac in those pictures...
It's probably just a stage. Kittens grow out of being extremely destructive after a while. (And if you're REALLY concerned you could always get him declawed, or give him those fake plastic fingernails to cover his claws so he can't use them. It's like the kitty version of a manicure! )