Someone sent me this picture from their phone, which has an Arlington, VA exchange. They explained that this is on one of their work doors, where they are expected to lock up at night. While I'm sure they appreciate the reminder, I wonder how you know if you are the "last" person or not? (actually, what happens if you forget or "forget" is you get a citation, according to the submitter)
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".