The owners of the coffee shop Manilo took these in seem to know how irresistible that one is. He said it was a few years back, maybe when everyone was watching Amelie (I couldn't find the relevant clip... if someone else does, please comment).
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".