What you say is true, but in a hypothetical folder, you would know that is all there is.
How do you feel when someone comes forward later and says, "I'm mary"?
Generally, when someone reveals the situation they posted about as a hypothetical was actually something that happened to them, my feelings on that "reveal" depend upon the motives.
If they seem to be attention-seeking rather than looking for genuine advice, I typically just ignore the thread from that point forward. Other than that, I don't really care how they phrased the question initially or later, as long as they didn't intentionally leave out information other than the fact that it wasn't hypothetical.
I don't think there should be a folder for that type of post because I see no utility in separating the type of threads. If it's not a type of thread you want to read, all you have to do is not read it. Particularly for threads that are hypothetical situations all the way through, it's really not that hard to just ignore it from the start.