[GordonS]

> Any parent probably invented the equivalent of one within the first six months of their kid being born

What?! No! (and yes, I'm a parent)

I don't detect any sarcasm in your post, but this is such an obviously dangerous idea that surely you can't possibly be serious?

[TeMPOraL]

I wasn't clear enough: I meant invented only, conceptually, not actually deployed.

My wife and I joked many times this should be a thing, but we would never have actually bought one, because it's clearly insane.