Well, to answer your question, are you throwing out the baby with the bath water? There are idiots wherever you go and whatever you do. I've pretty much learned to be thick-skinned, but yes sometimes things gall me!
As far as stock goes, it has always been whatever was available for that particular car for the year of manufacture, but it can be a little tricky there. So, say you bought a 1967 Mustang with a 6 banger in it. You pull the engine and put a 302 in it. Well, in '67 there was only the 289 available, but you could buy oversize pistons and bore it out to a 302, so I would suppose technically it is still "stock" but if you are a purist then it isn't stock and you can take it further and say that "stock" is exactly the way it rolled off the assembly line and even swapping in a certified "67 manufacture 289 would make it no longer stock...