Simple solution moving forward when trying to do things with randoms always be the person inviting the other people. It might take you longer to get a group together but when you are the leader there is no chance of getting booted. On a side note I do think he is a little young to be playing destiny since a majority of the community are teenagers and up. Considering a lot of people use foul language in this game including myself it's probably not the best environment for younger gamers.