Alyssa Pereira at SFGate:
Everybody knows the world’s worst people are the ones who never miss an opportunity to explain the difference between who and whom. Those “friends” who are pretending to be policing spelling and grammar for the sake of posterity are probably just flexing for attention, or so it seems to everyone they’re interrupting.
As a study from the University of Michigan recently found, those people aren’t just annoying, they’re also apparently huge jerks.
I offer a special dispensation to copy editors, who risk being seen as jerks because of their profession.