I help review questions on Chem.SE regularly, and this type of question comes up regularly. Some downvoted homework question by a new person to the Chem.SE network, usually because they weren't aware of the homework policy in the first place. Is it possible that, to help them, we could link them to the homework policy in the "How to Ask" dialog, somewhat like so?
Note: I usually don't foray onto meta sites much, I'm a chemist, not a meta-chemist. This is my first post, please tell me if anything needs to be fixed.