To the sign-maker's credit, I also have little appreciation for the music that others choose to share loudly from their cars. Karla (who goes by Karlita in LJ) submitted this great example of questionable sarcasm. Incidentally, where I come from we say "turn it down" instead of "put"; is this a regionalism? (this photo taken in Arizona)
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".