Discord needs to take its user privacy settings more seriously. All bots and 3rd party websites that allow any other users to access information about another user's user info need to be shut down.
This allowed players to be stalked, harassed, etc. Admins will claim these are tools they need. They simply don't and should have no access to that information. A user's user info should all be completely private, and not accessible by anyone by a Discord employee.
There is simply no reason to know when someone created a Discord account, joined a server, etc. And allowing this behavior infringes on a person's right to privacy. No one can see when you joined Gmail, who you e-mailed, etc. Discord can and should be no different at all.