As in, hit it with a sledge hammer.
They are surprisingly robust. After the three hundred and twenty-seventh Fujitsu hard drive died on me that month I had at one with a meaty claw hammer and it barely marked it. A sledge might give it pause though.
But really do many people find it hard to resist picking up some crusty old barely functional laptop out the skip just to see what’s on the HDD?
For most practical purposes it’s unlikely. I would want to properly erase enterprise file server drives, but no-one is going to be doing data recovery / password cracking on a drive they’ve pulled out of a skip unless it’s a targeted attack. People can download their own goat porn these days, they don’t need your laptop.
But if you want to do it properly – and for the little amount of hassle it is, I would – google “DBAN”.