Well, this question does provide one good bit of information.

Based on the answer %s at the time of of writing, I estimate than somewhere between 66% and 74%* of the respondents to the question simply copied the code into a query processor and ran it to get their answer.

Cheating, or simply using available resources?

* 74% answered correctly, and I'm willing to accept that ~10% of those actually saw the trick. I rounded up to give them the benefit of the doubt.