This has nothing to do with people following instructions to the "T". Not sure why you refer to them as idiots though - almost as though you never make mistakes in your life, ever...

I personally rely on my SatNav to get me from A to B as I travel all over the country daily. It's not necessarily for the motorways or other major roads, and often just for the ability to estimate actual arrival time. However, when you are traveling to different places each week, or to different areas in the same place, you try doing that with an A-Z sat in your lap or routes just memorised. No, didn't think so.

GPS has become such a common part of life that it's up there with the likes of electricity, flowing water, internet, mobile phones etc. People just expect it working, and rightly or wrongly they depend on it. When you switch on your SatNav, you expect it to help get you where you need to be (yes, with some common sense thrown in). I had no such assistance getting somewhere the other day and was late to an important meeting because I was in an area I didn't know.

My fault for not allowing for such eventualities? Sure, I have no problem accepting responsibility. At least I don't go around acting like an idiot taking great pleasure from the misfortune of others who were affected by something outside of their immediate control.