Beware of this one folks, someone sent me an ebay message asking for a picture of my S9 for sale, along with a piece of paper saying "crazyantminer24"
I didn't send it exactly as requested because it sounded like someone asking me to proof their username, it only now just occurred to me to google "crazyantminer24" to find a possible thread... and bingo.
Screen shot: https://i.imgur.com/31S6mhZ.png