This is a variant of the solve-my-homework issue:
I noticed a few times that users ask questions without disclosing that their problem is taken from a running security challenge. Well-phrased questions that stem from "hacking games" can be good. But what concerns me is when someone asks us to help with an ongoing competitive challenge that has a ranking system or offers rewards. Even if they disclose where it's from we're basically helping them cheat.
Should I call them out / add a note about the source / vote to close, or is it entirely irrelevant where a question comes from when it's on-topic?