Specifically, this question: What is the secret of the blue bug in Your Doodles Are Bugged?
I tried tagging the question as 'untagged' and 'tagme', so that someone else could edit and add the appropriate tag, but no joy. Eventually I just tagged it Steam.
I'm not suggesting that meta tags are a good idea in general, but in this special case they would have solved the problem.
What other solutions could / should I have tried?