are we talking about just blizzard scams or scams in general? Because I think that some scams out there would even trick a fairly smart person. As for blizzard scams, well.... those are pretty obvious most of the time.
I'll admit, I ALMOST got tricked though when I got an email saying my account was suspended. I got all confused because I wasn't even playing or paying for WoW, so first thing I did was just log onto my account on the actual blizzard site and see what was up and everything was fine.