Via Language Log, a website devoted to pictures of signs that use quotation marks unnecessarily. It’s hilarious, as these examples should illustrate:
Well, it tastes like chicken…
To use the colloquialism, “and.”
He told me that was his name!
You wanna refund? I give you a real good refund, sure- right in da face!
acilius
believer1
lefalcon
losthunderlads
vthunderlad
Panther Red 
cymast
/ October 15, 2009A former “client” of mine had a habit of putting quotation marks around “seemingly random words” in his emails to me. I thought it a symptom of “mental disturbance.”
acilius
/ October 15, 2009Maybe it “is.” If you know “what” I mean.