When we answer a thread I hope we all actually read the question and answer with that in mind, so if JohnW2 was to ask a question the answer from me would be very different to the same question asked by an unknown poster.
A few years ago I tried to advise some one how to work out which wires were which on a ceiling rose, without using a meter. I wrote down detailed instructions (not on this forum) and read through what I had written, and I was satisfied I had got it correct.
The result was I was banned. I don't think I made an error, however the guy who complained did have a valid point, the reader could make an error in reading and could make a mistake which could put them in some danger.
Many posts we don't agree with each other, and we have also ridiculed those who try to post videos on Utube as most will miss out some point which we think places the viewer at risk.
To formulate an fool proof method we would need to have a private discussion and iron out any flaws before it was placed in the public domain. Any errors would leave us open as one would assume once done it would not be open to further discussion or it would result is another thread with 100's of answers which no one wants to read.
Some times I am reminded of my mistakes when I was younger, and the problems I had grasping a concept or method. Nothing to do with electrics but I remember first time I drove a flat bed wagon, and my problems roping and sheeting, and also how it seemed to just click, and then I would also do it that fast others could not follow what I was doing.
So what you need is an apprentice, and a thick one at that, so you can see if the instructions work. But once he improves then he's no good.
Many years ago I started watching Time Team with Tony Robinson. The good thing was Tony Robinson knew nothing and asked the same questions I wanted to ask. However as he learnt more, his questions started to reflect his knowledge and so later Time Team episodes he did not ask the right questions and it lost it's appeal.
Having a Wiki is great, but when the site was revamped many of the standard answers were lost, and it will take a lot of effort to replace the pages with peer read and corrected versions which we all feel are unlikely to lead the reader astray.