In my opinion, whipping up a cap to show how to do something isn't really the best way to do things in every case - in fact, I think it could make things worse. As the proverb goes: "Give a man a fish and you feed him for a day. Teach a man to fish and you feed him for a lifetime."
Really, quite a lot of questions boil down to the fact that person asking the question doesn't understand game logic. The first thing in learning how to make games is to understand how they work and the ability to break things down to their most basic components. When you understand what makes up something, you can start working on it and looking for ways to achieve something. At this point if you face a problem that you can't seem to solve and ask about it on the forums I'd say it's okay to answer it via a cap or comprehensive description - after all, the asker presumably knows what he wants to achieve on a basic level, just not how to do it.
Let's take another recent example - the question "can you make teleports in Construct?" Applying some deconstruction here, you can see what "teleporting" means: moving object from point A to point B instantly. Now if we think about what things do in games in general? They move from point A to point B. In other words, if you can achieve anything where something moves from point A to point B in Construct, yes, you can have "teleporting functionality" in Construct. It doesn't take much thinking to figure something like this out - we should encourage people to think.
So I guess the bottom line is that we should encourage newcomers to learn game logic before asking questions about how to make X in Construct, because if they don't understand game logic the answer will most likely not be of any help to them.
Personally I don't even bother to answer topics made by people who seem to have no motivation to do anything themselves at all; maybe if no-one answered an obvious question, maybe they could think for themselves for once. I guess I'm a bit mean in that way, but honestly, even if you're new to something doesn't mean you couldn't try learning for yourself. It's not like you're going to kill yourself by doing so!