Highwaymen are criminals that assault young adventurers under orders of Dirk Turnip, their leader. They used to be led by Robin, but his crazy ways made them leave. As the highwayman Jeremy Louis “The Lesser of Two Evils” Shawaver suggests, however, Dirk is not much better than Robin. Highwaymen will attack players up to level 10 and may prove a challenge to new players who are just passing by. They always will attack while saying "Stand and deliver!".
They are not aggressive to players who have a combat level of 33 or above, and can be deadly to new players trying to get to Falador.
"Stand and Deliver!" is a reference to a phrase most often used in the 17th Century where highwaymen would use the phrase while robbing travellers, which meant to stand still and hand over their money and valuables.