lucy24 - 10:56 pm on Dec 5, 2012 (gmt 0)
#1 Ignoramuses* don't know they're ignoramuses.
#2 They know that only their fellow ignoramuses will fall for it, so no point wasting time getting the text right. After all, they don't bother enclosing the standard images and boilerplate that would accompany a real e-mail from PayPal, LinkedIn and so on.
* The word is English.