Chuck,
I don't know why you feel so strongly about this. As far as I know, I haven't called you any names or anything like that. I try to understand the position of (the collective "you" of all the people who don't agree with me) but I don't seem to be able to get past the name calling.
The paragraph you quote above is an example.
Me, pleasure pliot, I can be as inefficient as I like!
Interesting line of thinking for a pilot.
Perhaps I don't speak English as good as I should but that comes across as a criticism - which I gently (spot the smily?) called "beating about the head". I figured you misunderstood what I meant by inefficiency and tried to explain what I mean by "inefficiency".
You take that to mean that I "know everything already"!
I think - I don't know because I don't have my licence back yet - that I can fly cross country without a GPS. I base that on previous experience. I want to understand why everyone feels that the GPS is so indispensible. Is this something that I need to learn? I haven't heard what I would call a compelling reason to abandon my previous position.
Because of this, I've been called grossly negligent, lacking airmanship, stuck in the horse and buggy age and various other things, not only by you but by various others as well.I don't recall anyone "teaching" me, apart from the expression of some opinions that it's to do with controlled airspace.
I'm no stranger to the technology that goes into aircraft. It doesn't take a genius to work out for whom I work. I spent a large part of my working life doing research into computer architectures and we were often denied the luxury of a specious argument, even though it could simplify life enormously! 
So, I like to ask questions, I like to measure the arguments and, based on what I hear from those who know more than I, I change my position. Basically, you're suggesting that unless I accept your opinion unconditionally, I know everything...
As Sciolistes said:
Well yes. As you have found, the mere suggestion that GPS is not a necessary tool to fly perfectly safely and accurately prompts derision, strange comments alluding airliner ops and shameless attempts at humiliation.
How unfortunately true
