I want to point out..... that if DO abandons the Tower and the Traveller they lose access to Guardians as a military resource, Ghosts to preserve those Guardians, and the ability to harness Light. Once they flee the are defenceless and trapped in an infinite void which the Darkness and other alien species have far more knowledge of than the Arrachs. Running is a very foolish idea considering the powers arrayed against the tower.