Several people pointed me to this blogging.la post. Silly string may or may not be legal on Halloween. Given that the law has the word silly IN IT, I wouldn't take it too seriously anyway. PLUS can the silly string merchants who don't get rid of their wares on the 30th get arrested for possession? (Yes, I'm a month behind on reading and posting submissions.)
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".