While I understand how badly you want smashed hard drives to be proof of guilt, the fact is, destroying (shredding, drilling, or smashing) old hard drives is on every IT (Information Technology) 'best practices' list. The same goes for smart phones, tablets, etc.
The goal is to prevent proprietary/sensitive data falling into who knows who's hands.
This has been standard practice ever since a number of companies/governments, 10+ years ago, were auctioning off old computers with the hard drives intact, and the purchasers of the equipment claimed ownership of the data.