We are bound to get smartasses who will want us to do their school homeworks for them eventually. Their questions will be sufficiently nontrivial, they are unlikely to meet any common closure criteria, and while answering them would be actually harmful to their learning process, by being overly critical we'll hurt these who genuinely could use our (productive) help while solving homeworks.
Honestly, I have no clue how to deal with that, and it will happen, I'm sure. Bringing the topic up for discussion.
Proposal: English Language Learners