It's not so much that I disagree that one of those woman silhouettes demands that anything suggesting "class" requires quotation marks. More that why would you draw attention to your own lack of class. As submitter Ellen wrote, "This inscription is a mystery wrapped in an enigma wrapped in bacon to me."
I don't usually post the following: newspaper headlines, personal email, craigslist postings, unprofessional websites. I also tend to not crosspost things from other blogs, since I have so much unique material waiting for me to get to it.
Things I see a lot: silica gel "do not eat"; hair dryer labels; inside the bus "do not drill"; Wal-mart sign about IDs; coffee machine with "2" cup sizes; employees must "wash hands".