When a user account has asked too many low-quality questions, they are blocked from asking more questions. Attempting to to ask a new question from that account will result in the following error page:
Minimalist would be an optimistic description of that error page. True, it does link to the full Help Center article on question bans, but in my experience, vanishingly few users click through to actually read that page.
Instead, what most users do is immediately create a new account—which is exactly what they should not be doing.
Therefore, I suggest adding some warning text directly to the error page, telling users not to try and work around the question ban by creating a new account. I would also suggest changing the potentially-misleading title text, which refers to a "question limit". The question "limit" is in place only because of a quality problem with their previous questions.
I envision something simple yet direct, like:
You have asked too many poorly-received questions
Sorry, we are no longer accepting questions from this account. This is due to your having asked a large number of questions that were poorly received by our community.
See the Help Center to learn more.
Please do not create a new account. This will not lift the question ban. Instead, work on improving your existing questions in order to bring them into compliance with the site's guidelines.
Bikeshed Iterate all you like on the example text above, but this page needs to explicitly tell question-banned users not to create new accounts.