A common mistake new users seem to make is posting questions (like this) asking about general programming help which are better suited in StackOverflow. While these questions are being closed, I don't think we should just let that happen and instead try to stop new users from posting these questions in the first place so that the homepage doesn't get filled with these questions. (Because if it did, new users would see it, and possibly make questions like them, amplifying the whole problem)
One idea I had would be to change the text on the side when asking a question to something making it clear that this site is for programming contests only, and maybe this could be something only for low-rep users.
What are your ideas for this? Should we even bother doing anything at all?