A lot of the regex questions on SO are just tagged regex, and nothing else.
Since there is such a huge variety of regex implementations, with significant differences between them, these generally end up with responses asking "what language!?" or similar.
(and especially so since many of them might be better with non-regex solutions)
It would be useful if there was a way to prompt users that enter a question with just a single regex tag (and no other tags to indicate language/tool).
i.e. in pseudo:
If (Tags.Count = 1) AND (Tags.ToString() = 'regex') Prompt("Please specify the language/editor/application this regex is for.")
If there are any situations where a regex question isn't specific, and yet somehow doesn't warrant any other tags, possibly a checkbox could allow bypassing this prompt.
Of course, that suggestion is pretty targeted functionality applied to a general area - this is why I'm tagging it as discussion first, to work things out, and determine what/if to put in a feature request.
I would see this as a generic "tag rule" - maybe limited to "if only tag X, show prompt Y" or maybe a more flexible set of conditions/actions to also allow "if tag combo X+Y do Z" type rules, but I guess that depends on if there are any other use-cases that would make that worthwhile.
If anyone has other ideas on how to encourage people posting regex questions to state what tools they're using it with, without having to waste answerer's time, that'd be great.
(Or indeed if there are other examples which follow the same pattern.)