Ian saw this in the the canteen of a place he worked in Wiltshire, England. I like the mystery of this one: how can you stop papers? Why is it a big deal if they are removed? Maybe you can't and it isn't, hence the quotation marks. I mean, in the grand scheme of things, paper security is minor.
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".