Let me preface my answer with an apology.
The dispute about whether to censor the title of the "s——thole question" should never have come up. My reading of past NSFW debates convinced me that the title censorship policy was up to the community, and that there were two major opposing views (i.e., no consensus). In this I was completely mistaken. My statement that the title should be uncensored was based on ignorance, and led to a bit of a mess, and I'm sorry for that.
In reality, the decision to censor titles is not open to debate. It is site policy, established by the business which owns the site. See the third question, "Should EL&U be removed from the multicollider, etc.?", where the site policy is clearly articulated by Jeff Atwood, StackExchange CTO. (And that is perfectly appropriate. It's their site and they can establish whatever policy they think is wise.)
In short, we have a simple, easy to understand policy on title censorship from the site owners, and we also have quite a few people who defend or criticize the title censorship policy as if it were debatable or a matter of community consensus. That is, the primary problem is not lack of a tag; it's lack of communication. The policy needs to be disseminated to the community. Stating it within comments to a question about removing english.se from the multicollider is ineffective. At an absolute minimum, it needs to be part of the FAQ.