Sometimes I want to send a PM to multiple people, but one user or another has a very common ID. So common, in fact, that they don't show up as a possible option when I'm typing their name in the PM list. It would be very helpful to be able to select users to add to the PM's recipient list via drop-downs of users currently in my games, and users who I've recently sent a PM to. Sometimes not everyone I want to message is in the same game, adn it seems silly to have to create a game and invite everyone in order to make sure that they all can get notifications as a group.