The fantastic thing about the Stack Exchange generally, and the Physics SE in particular is that it gives you access to people who are expert in their area. This is an extraordinary resource, and I would have loved it to be available back in the 70s when I was a teenage science nerd.
But working physicists are busy people with mortgages to pay and families to feed. If you want them to answer your question then you have to make it interesting and rewarding to answer. That means putting in the Google legwork to research your question and work out what the important physics behind your question is and how best to phrase the question. We see a lot of beginners' questions that give the impression little effort has been put into them, and in these days of the Internet there is no excuse for this. It gives the impression the OP doesn't really care, and in that case why should busy physicists make the (considerable) effort to write a detailed answer? Asking on the Physics SE shouldn't be the first option - it should be the last option and only used after easy options like blog articles have failed to provide an answer.
I'm not a fan of banning questions, and if beginners want to ask questions that they have not thoroughly researched then let them ask. However they shouldn't be surprised if the questions are ignored by the more experienced members of the site. Such questions also attract downvotes, though my own view is that this is rather petty and I only rarely downvote.
Re homework: this discussion has rumbled on and on. If someone wants to learn some physics in order to do their homework then I'm happy to help because I think learning physics is good. If they're just trying to get their homework done then I would probably vote to close.