Also might be worth looking into "Friend Codes" like Steam have in the Add Friend Page. The Lobby Codes should be as less complex looking as possible (guess that will be difficult with hundreds of thousands if not millions of sessions) more like "65854-58321-85435" rather than "CvCSVCXVxVCSFds8YZER-à_4256'ékŷ-4GKCBcxkoÖKT2"SDFoŝ"