Some questions turn out to be solved quickly by the OP because they made a silly mistake. Others turn out to be completely unrelated to EE. Often, these go "unanswered", as the the OP doesn't want to accept their own solution which was really no solution at all.
Here's a question I'm looking at right now: Sudden access denied message
This is a case where an odd server hiccup changed the permissions of all of his files, and it's not directly related to EE. Does this need to be here? In all likelihood it will sit unanswered.
In a couple of other cases I went ahead and deleted posts (only mods can see these I think):
In both cases, the end result was not anything that seemed useful for other visitors.
In the first case, the question contained no code and just a general description of what he was trying to achieve, and then he followed up with a brief comment saying he figured it out - essentially just using Playa as it is intended to be used.
In the second case the OP answered his own question:
I found the solution and It was not a problem with my global variable. One of my config line was wrong and the rest of the code was not executed so I couldn't use them.
So, a typo essentially.
But maybe I'm being heavy-handed here? Are these all cases where the questions are just noise?