^^^ This - and more.
Most people leave their clip-on GDO on the visor. I've removed them (and disabled that feature) from our openers and use an iPhone app now. No remotes to use or steal, and the iPhones can be remotely wiped if lost or stolen!
And it likely wouldn't work with a van for logistics reasons, but for a home or shop the absolute best deterrent is a big dog with a protective streak. Here's my example:
Years ago we lived in a rented town house and I had a VERY expensive component stereo system. (Yeah, I know - priorities, right?) Both my wife and I worked, so no one was at home during the day - except our German shepherd.
One evening I came home after work to find the front door open and part of my stereo system disconnected and sitting on the steps. Right alongside it was my dog, looking very proud of herself. She got a steak that night! GOOD dog!
![Thumbs Up [thumbs up]](https://www.festoolownersgroup.com/Smileys/default/thumbup.gif)
Epilog:
A few months later a neighbor kid was out riding his bike down our street and saw our dog. In one move - I'm still not sure how - he lept from his bike to the top of a parked car. By that time our dog had him trapped, and he yelled "mister, call off you dog" (No, that's not a typo :-).
I left him there while I called the police. Once I completed the call I approached him (but not too close) and said "My dog doesn't seem to like you. Why is that?" He wouldn't say anything, but when the police got there they took him home and in his garage found thousands of dollars of stolen property. Turns out he and his buddies were coming home from school and hitting all the places where people weren't home.
I don't know what happened to him. I never saw him again, but I still had my stereo system and a very good four-legged theft prevention system! We've owned german Shepherds ever since, I can't imagine being without one.