Thanks for the link InterBlog. And I agree with you.
Everybody jumped to the worst case scenario of hot van in summer going for a hike in the desert which is just stupid and unacceptable.
But for us, on our first trip with our dog it became necessary a few times to leave him in the van unattended. Here's some examples:
- grocery store
- a nice lunch or cup of coffee at a nice place recommended in guide books (on a cold rainy day)
- museum
In none of these cases was he in real danger and never has he bothered anybody. We park in the back of the parking lot with windows open and/or on cold days. We're also installing solar panels and a quality roof fan to ensure even more safety for him.
The worst case scenario was the ferry that forced us to leave him in the van for 17 hours (of sleep at night).

But it wasn't too bad in the end.
To be frank, we would much rather bring our dog with us 3 weeks and leave him alone half an hour every other day than leave him at a shelter that cage him for 22 hours a day.
Plus, he comes from a shelter and he's "van sized" (12 lbs.). He has an amazing life with us.... other than the fact that we have to work.
I would not trust the "automatic start mechanism" for my dog's safety. I actually think it's more appropriate for keeping your van ready when you return from hiking in warm weather or from a day of skiing... But I wouldn't order it.
This will probably (has already?) turned into an ethical debate... But it's a forum to ask questions and the OP has a legitimate question that deserves practical answers. So just my 2 cents. :whistling: