There are no stupid questions, but there are plenty of inquisitive idiots.
I've no clue about the mechanics of using Facebook myself, since I don`t use it and I`ve no desire to. And I`m only vaguely aware of some of the other topics like Spotify and Pinterest too.
When I was just starting out my company some years ago, to get some cash flow I used to supplement my income by teaching a basic computer skills course to complete novices of all ages that had no idea about technology. You`d tell them to move the mouse over to the left of the screen, and they`d physically pick it up off the desk and place it on the left hand side of their keyboard. There`s a difference between being merely without knowledge, and being actually dumb. Most of them weren`t stupid people, they just didn`t have some basic knowledge they were going to need yet.