Pedro Martínez: If she is indeed talking about currenly avtive games, then about the only use I can see for this suggestion is that it would create a watch-list of potential players to add to one'e enemies list, thus avoiding the frustration of playing games against opponents who don't actually know who they are playing against!
(I also get irritated playing against people who mindlessly wish "GL" every time a new games starts in a multi-game match, mostly completely unaware that the new game is actually an extension of the existing match, so all the niceties have already been exchanged, and I suspect that in most cases they are a part of this group.)