Haha. But seriously, I don't understand how people leveled up in the first place. For a new player, meeting people in maps is a good way to make friends that you can run with, because they would be the same level, and they would want to run the same map as you. For newbies like me, leveling up will be faster and the experience in terms of team gameplay will come quicker. I don't understand the logic behind this random joining system....