Couple message system feature requests. They may already exist but the term "message" is so prevalent its hard to find, feel free to point me to other requests if they already exist
Add the ability to add messages to every user, that they see the next time the log in. Ideally they would have an expiration date. For instance, "Server will be shut down for maintenence on MM/DD/YYYY" that would expire the day after. So if they didnt log in, they would never get it.
Add abilit