I once worked as a proofreader for a magazine. The writers were from the US, Britain, Australia, Japan...everywhere. I had many pleasurable hours trying to figure out the "correct" grammar, punctuation, spelling, style, and so on. (Note that I did not use "etc" for that was forbidden except when used in a sentence in parentheses.)
Strangely, it often took hours of back and forth phone calls, e-mails, and tons of research to come to agreement on this stuff. The "rules" aren't especially clear (although everyone assumes that they are) when you start trying to establish a standard for all countries. You can't even get 3 people from the same country to agree. Everyone can almost always come up with evidence to support their version of the rules.
After a few years in that exciting and enjoyable position, I left for other less mind-numbing work. Though it is easy to find errors nearly anywhere---including the New York Times---I have learned not to numbskull myself any more than I already am by worrying about it. (Yes, I realize that "numbskull" is not generally used as a verb.)