I get the impulse, but there's a reason that Amazon offers its A-to-Z guarantee rather than an a priori vetting process. Because the latter is literally impossible.

How does the vetting even occur? Do we have armies of "compu-physical engineers", imaginary polymaths capable of analyzing any imaginable physical and/or software product for characteristics that should be rejected? If we had such mental deities at our disposal, why would we waste their time vetting gummi penguins for a retail outlet?!?

Given that we won't have a magical vetting army, it'll be exactly like the TSA: enormous costs incurred to vet that the overwhelming majority of stuff is just fine, a bunch of horrible side-effects from false positives, and bad stuff will still slip through whenever someone wants it to.