Kind of like a giant ziptie with some layers of metal in the middle: https://www.singletracks.com/blog/mtb-gear/ottolock-secure-your-bike-at-a-campsite-cafe-or-on-your-car/
I like it!
Basically a deterrent is whats needed. Face it…it would be easy to strip a bike…so a lock that prevents a quick grab is good