I wish it was like mass effect or kotar and you could choose your alignment. Light or dark. "Dark guardians" (because I don't have a name for them) or maybe "rogue Guardians" (because it sounds badass) anyway these rogues are not allies to earth and it's colonies or the darkness. They thrive in the run down wasteland that is earth. They take out hits on light guardians (pvp patrol). They are mercenaries, they do not gather at the tower. To go dark maybe it starts out like some kind of exotic bounty, with annoying tasks and it leads into intense story missions where you betray the speaker and the vanguard. Maybe you work for the awoken on the reef. After you do the missions you can decide to go dark or rogue, or stay with the light. There if chosen you are awarded your first piece of dark armor. Then from there out you could get bounties on your head from the light guardians and vice versa. All armor loot you would receive would have dark points instead of light. Idk I've got a big imagination and I kinda wish they did this originally. Really think about it, not everyone on earth wants the government to survive, they want to see them burn.