I recently asked and self-answered a question about a racist slang term (Q) because I wanted the term documented for the record. The question was initially poorly received (score -3), though the answer fared better. None of the early downvoters left comments as to why the question "is unclear or not useful". It crossed my mind that because of the taboo subject matter, they might be downvotes for disagreement analogous to what routinely happens in child metas and Meta Stack Exchange.
Some Stack Exchange sites (but not child metas) automatically impose an indefinite question ban once a user asks about three poorly received questions, but not all do. I wonder whether this question would count as my first of three strikes, or whether English Language & Usage uses post bans at all.