<p>It seems hard to answer this without knowing quantities and (for most of us) without being able to see what moderators can see. </p>

<p>I naturally approve of the unstated principle that we should not discuss individual cases explicitly in public. Nevertheless, policy here often follows from precedent, in the sense that it can take a user being a nuisance in a particular way and irritating enough people to become conspicuous before we can decide what is unacceptable behaviour. (Some times, fortunately, people who prefer their own rules for posting and discussing to those of the forum jump before they are pushed.)  </p>

<ul>
<li>Posting (and often deleting after downvotes) a large number of very low quality questions.</li>
</ul>

<p>Clearly we want to discourage such posting. Deleting low quality questions is public-spirited, however. But what is a large number here? I feel confident that I would have noticed any such user with 100 questions. I can recall one intermittently active user who has posted many questions over the years, mostly when a puzzling passage is encountered in their reading and they ask for clarification without, it seems, reading around very much in other places. But their net contribution is positive. I can recall one user who very intermittently seems to ask slightly different versions of the same highly cryptic question. That person is puzzling rather than a real nuisance. Perhaps other cases are in mind. Any way, can you put some numbers on these statements? </p>

<ul>
<li>Having all of it in place would reduce the ability of new users to post many poor questions - they would progressively only be able to ask weekly, then only after improving their existing questions. </li>
</ul>

<p>At a guess, this would just drive most of the posters with very weak questions straight off the forum. That seems harsh. Many very poor questions just aren't improved at all, but making it more difficult for posters even to try again would be tough. </p>

<ul>
<li>It's possible a few of our current users with very large numbers of downvoted and deleted questions and very few upvoted questions might not be able to lift the block at all.</li>
</ul>

<p>Again, how we can comment on this possibility? </p>
