I understand what you mean, and don't really disagree, but that is just semantics. People do know what you mean; it is like when people say that "drinking is bad for you, or for your brain", they don't mean that all intake of liquid is bad (it is after all a necessity). Even though it may seem a silly example, context is the key to most of our communication, although a certain expression may not be "true" verbatim. You did know, as did most others, exactly what I meant, and as an expression, in this context, it means the subset described approximately in the link I gave to the Jargon files.
And no, I will not battle you over it, really. I just couldn't resist. Heheh. Like I said, you are correct, also. :)
You have moved into a dark place.
It is pitch black. You are likely to be eaten by a grue.