Often (or mostly) we all encounter, when a new user asks a question that there is no MWE
(done that myself). Also, we mostly ask them to post an MWE
via comment.
So, apart from giving a tour of the site when they join, will it be a good idea to inform the users (only when they ask their first or first-few questions) about the MWE
? For instance, a marque
or a highlight
on top of the page where the question is being typed.