Didn't get photos, but I'll have excuses for that in a minute.
I saw a homeless man with a sign that said "Free for a good home." Obviously, it would be rude to take a picture of a homeless man, right?
In addition, I saw a piece of reused yellow cardboard with messy hand-pencilled words, saying, "We make signs!" I couldn't take a picture of this, because people hate bicyclists enough as it is, and if I slow down to take a photo, then they'll hate me more and that makes me sad

Also, it think this sign was just being sarcastic. Sarcastic sign.