On meta.SE they have this Tag:
This tag is for questions regarding off topic questions, including whether a question is on topic and what to do with off topic questions.
Wouldn't that be useful here, hopefully not as the most common close reason, but to assist Mods to locate questions to be closed; or possibly where an Editor thought it was obviously off topic and decided to tag the question (and ?hammer? VTC)?
Some sites (SO) have mapped it to [scope] while others (SE) have them separated.
We seem to be missing that Tag, instead we only have these related Tags:
close-reasons There is no usage guidance for this tag.
vote-to-close There is no usage guidance for this tag.
scope for questions about which subjects or questions are allowed on this site
In the beta-stage of this StackExchange website we (the community) have to define what our site is about and what our site is not about.
This happens in two ways:
1. Voting to close off-topic questions / Voting to reopen closed questions 2. Meta-posts discussing the scope of this site.
If you have a question whether a topic is on-topic on this site: Ask a meta-question and give it this tag [on-topic].
The question you're asking is designed to solicit opinions or best-practices on a particular topic, with the goal of reaching community consensus.
Discussion questions are the heart of your community. For example: Should a certain question be allowed on the site? For what reason did a moderator lock a certain question? Are said actions setting a precedent? Be sure to present your entire case and background information/data so the subject can be discussed fully.
Other references: Off-topic reasons for Quantum Computing
I'll post my 2¢ below, others can put forth alternate suggestions or vote up other answers.
When a decision is made this can get a $\color\red{[\text{status-completed}]}$ Tag and the Moderator can choose the answer. This RFD was prompted by a good question, but better for physics.SE or ornithology.SE.