It would be nice if we could see somehow that someone is getting the infamous "Sorry, we are no longer accepting questions from this account" message when trying to ask new question, same way that we can see when someone is suspended when viewing the user profile.
It can appear as the same red bar as in the suspended account, or something else.. maybe only via the moderation tools for 10K+ members.
Right now when someone ask such question we can only assume this is the case but can't know for sure.
Edit: as we can all clearly see, there is a steady rise in programming questions posted here on Meta by users who are getting banned from asking questions on the main site. While we can handle this easily, it would still be useful to show some indication that the user is question banned on the main site even if just so that people won't waste time trying to offer guidance to those users.