This month, the Evil Engineer suggests the best way to weaponise an asteroid and get back at a faithless friend.

Dear Evil Engineer,

Five years ago, I founded a spyware start-up with a close friend of mine – since our undergraduate days we had shared a dream of empowering people all over the world to run their own mass surveillance programmes. We agreed that he would serve as CEO, with me as CTO.

However, six months before the date of our IPO, he shut me out of the company and diluted my stake in it. I have seen the company I co-founded in our student flat secure multiple contracts worth hundreds of billions of dollars, and enjoyed none of it.

It’s time for revenge. Can you advise me how to send an asteroid crashing down on his house?

Yours,

A sidelined villain

Dear villain,

I am sorry to hear about what happened to your start-up. Although the pain of betrayal never entirely fades, I hope you can still derive pride from the knowledge that civilians everywhere are being intrusively monitored...