Is it our responsibility to police for these questions?
Next thing we know, every organization that has some introductory math tests (that are sophisticated and unique in their opinion, I'm pretty sure) requests we police math.SE - that's their responsibility to take care of in my opinion.
Now, math.SE isn't the first StackExchange to face issues of this kind, mother StackOverflow has similar questions such as
- A question from an online programming exam I was partly responsible for conducting was asked here
- Does StackOverflow collaborate with online exams?
- Is this normal behaviour or is somebody cheating in an exam?
- Homework questions are one thing… but what about exams/quizzes?
Heck, there's even an ethics tag at meta.SO. Honestly, I only skimmed the answers there for now, but I think there are some good points that also apply here, especially:
$\rightarrow$ Questions from an exam/contest/etc. are usually very homework-like, so they are supposed to be answered with hints only anyway. The internet has become part of our daily lives - deal with it.