So basically Celau and Compmix used a VCE that logged people's keys when you joined Celau's servers (Baby Driver, Office Insurgency, etc.). A lot of these keys were permanently lost (my key was one of them) due to them being instantly linked to a steam account that Celau then used to spam the server list about a few months later. There's a github post with all the listed keys and the usernames associated with them. Compmix however had confessed due to guilt, likely because of the fact that he committed basically a federal crime, and told badspot how the VCE worked in order to fix the issue. One of these fixes was switching the game to steam only and removing the ability to change your name on blockland. So if you see anyone with a familiar name that has a very high id it's because they are using their steam alt.