[Eye of Unk]

I would get a beater, paint it shiny, make it look like it has gizmos in it like a GPS etc.

Install some permanent dye cannisters under pressure with nozzles around the corners of the vehicles like pop up spray heads, when the perps try a smash and grab the whole area 30’ around the vehicle does a high pressure spray of something like a pink dye.

Or rig it like a James Bond security system like in The Spy that loved me.

[hoosierham]

You'd be arrested and vigorously prosecuted for setting a trap for sub-humans.

My ex insisted on leaving her vehicle unlocked on the theory less damage would be done if the thief didn't have to break a window ,and nothing in there was worth stealing anyway.