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So I saw the article on D3 here and I decided to give it a go. I haven't touched my Battle.net account since 2012 and when I tried to access it, it was gone. Turns out I was hacked and had to get their customer service to restore everything (which they promptly did).
So I never click on the bogus "Bettle.net" emails and I do pick good passwords so I'm trying to figure out how I got hacked. It's never happened to me before. I think I'm going to add the authenticator app they have just to be sure from now on.