When we get new gadgets or we are normally replacing old ones! However, these older versions are then either sold as second hand or stacked up on a shelf. However, there is another way of making sure that the devices are no longer usable and that is to give them to Joerg Sprave, he seems to hate the iPhone in particular.
Check this video out, he is famous for building extra powerful sling shots and this version can fire an iPhone into the air, in a wall and just about anywhere else you would fire an iPhone (Steve Jobs jokes are not allowed!).
Source [Nerd Approved]