We have no ability to know when a question is really something the student should do on his/her own without help (can any instructor enforce that if it is a take-home exam?), or if it is something out of a homework exercise, or even if this is from someone not in school, but simply had a problem he/she wants to attempt.
So without knowing such a thing, we make a blanket rule that all Homework/Coursework questions, and all homework/coursework-TYPE questions should be in that forum, and that all the rules associated with that forum apply. This means that the person asking must show what he/she knows, and what he/she has attempted, and the members are strictly prohibited from giving outright solutions. This way, even if it is really something the student is supposed to do on his/her own, we have at least not contributed to an outright cheating.
But having said that, if we obtain information that the question did come from something that the student should not have asked help for, then we will delete the thread and the member will incur a PF infraction. We take such cheating very seriously and class instructors have contacted us in some cases.
So when you provide help to the students, make sure you provide "guides" on how the students can work out the problem themselves. There are cases where the students are either lazy, or simply clueless with almost no knowledge of how to find the answer. In such cases, simply walk away. It is always better, in this case, to do too little, than to do too much.
Zz.