Diddy Reese used to (and may still) have a sign advertising their ""All beef" hot dogs."
I always wondered why "All beef" was in quotes, but I was never willing to buy a hot dog to find out.
It's possible that, like the post office, any place where employees make their own signs is a place where employees don't know the meaning of quotation marks. I was at the post office today (for something like thirty or forty minutes to mail a single package, incidentally, while one guy was on duty and a customer ate up ten or fifteen minutes all by himself mailing ten packages at once while the line stretched out the door. I wanted to sarcastically applaud when he was finally done. Why aren't crowds in real life as cruel as crowds in movies? But I digress). In the post office there were office-made signs everywhere, all of them lousy with quotation marks:
"STAMPS" WILL BE INCREASING BY 2 CENTS ON JUNE 12
IF PAYING BY "CREDIT CARD" PLEASE BE PREPARED TO "SHOW ID."
Many people seem to assume that quotation marks are, like italics, underlining and capital letters, simply a handy method of adding emphasis to something. These people also tend to use all four techniques simultaneously.
Oddly, when I was in England for the summer in college, I noticed that English publications seemed to misuse quotation marks even more than we do. You'd think they'd know how to use their own damn language. Don't be fooled by their sophisticated accents! English people are just as stupid as Americans.