Are you really a parent?
It's got absolutely nothing to do with whether it's legal or non-emotive risk management...it's to do with taking care of one's child or children and NOT exposing them to any unnecessary danger whether the risks are real or perceived!
Raising children is fraught with risks throughout their lives...leaving very young children unattended in cars in public places for more than a minute or two is simply irresponsible and a risk to which most sensible and responsible parents simply wouldn't expose their children.
And yet my children are still alive. God alone knows how.
Want me to post pics of my kids to prove I'm a parent? Or will that get someone fretting about posting pictures of ones children on the intermapaedoweb?