In the Alpha I made a friend in the Dark Zone and we got some sick loot and hijacked some unexpecting guys and stole some more loot before I eventually killed him, then joined another group. You can team up with whoever, but that moment that you come across someone and don't know whether to shoot or invite them to your team is tense as fuck. Sold me on the game.
Your nonchalant retelling of this vicious betrayal brought a smile to my face.