Originally Posted by
bikefor2
Mount a blinking light on the rear rack or stoker's seat. Something bright with multiple blink patterns such as the Planet Bike Super Stealth Flash. If they can stare at that thing very long I'd be surprised!
has to be a DiNotte to really work, but boy those are hard to draft for long. The stoker shoo-fly wave is sometimes effective, as is slowing a lot or stopping (but that's a PIA and still not 100% as noted by other posters). You could also try conversation: "what part of NO don't you understand?"