On this page you can find all of the users that are on the universal banlist.

These people will automatically get banned in Discord servers that have this feature enabled.
Only serious offenders will be added to this list, after a thorough confirmation of the offences.

If you'd like to figure out what their Discord handle is, copy the ID and surround it by "<@" and ">", so for example: <@123456897123546789>.
If you paste that into a Discord chat, you'll see what their username is.

Another way to verify who a user is, is to use Friendlybot's userinfo command. You can use this by typing: -userinfo followed by the ID, for example: -userinfo 123456789123456789

To enable this feature, type -universalban on
You can find the file with banned players here

Currently there are 3986 people on the universal banlist.