Make a system that allows people to communicate with each other without being in the same room.
Involve things like:
*Cool down on messaging. (to prevent spamming)
*Be friends for more than a day to be able to message that person.
*Have automatic phrases like, "Can I Join You?" | "Invite?" | Who's room are you in?"
*Not being able to message while in the same room.
And other nesscary things to prevent trolling.