A long time ago on the screen savers... they threw a computer off a rocky cliff.
Course it all had to be picked up later.
Wood chipper?
Chain saw?
Use it in some other gratifying project.. such as the test subject for building an at home laser array?
Make an aquarium?
Make into a BBQ grill?
Go skydiving with it?
Liquid nitrogen it.... then hit it with a hammer.
Buy model rocket engines, fix them to the sides, and make it the first HLP satellite in orbit. ^_^
Honestly the cement and nabbing crooks idea sounds good to me.
Maybe rig an extremely annoying siren to go off if it moves off the ground.
Just for extra "no way you're getting away with it" factor.