User blog comment:Pinkgirl234/Wikia Chat and Discord: The Pros and Cons of Both/@comment-5710342-20161015165443

About that last con for Discord; "There are no automatic messages that will notify if a user has entered or left the Discord server, or has been kicked or banned from the Discord sever." This can be partially remedied, as we have a bot that writes down a message for whenever a user is kicked or completely leaves the server, but it doesn't announce anything for disconnections and connections.

Also, I'd like to point out a pro and a con for Discord:
 * Pro: Discord prevents you from sending messages too quickly using "Slow Mode", requiring every user to wait for an interval of time between each message they send.
 * Con: Slow Modes can sometimes stack, which makes the interval atrociously and unnecessarily long and effectively kills off chat. Note that it's possible to escape this by moving over to another channel.

Oh, and a pro for both chats is that you can set yourself as AFK/Idle so people do not disturb you. This can be, however, abused on Discord as a seemingly "Offline" user might be online, there isn't much harm to it but stil...