In the UK you have to put a £1 coin in to unlock it. Whenever you return the trolley back, it gives you the coin back

It's interesting to read the comments, as there are people who are like

I sometimes don't return the cart and I attest myself to not be a bad person. Therfore the test is bullshit.

But then they behave like a dick in the comments; showing involuntarily that the test is a good metric.

So I think even a post about this test works like the test on a more meta level.

Animals are far better than people.