No rope needed, unless of course they really do want to hang themselves. Just hope they can last long enough to follow you to the Triumph dealer & they can all change to Rockets. Mind you over in Oz that could be some miles away-no they won't last that long.
Dave just adjust your mirrors so you can't see behind you .. that way when their indicators go on you can just keep riding. Angry phone calls when they finally find their way home should be responded with .. "true" .." didn't see you pull over bro" (they seem to like being referring to each other as bro)