1) 8chan doesn't show bare IPs, only the last eight characters of a user's IP hash, generated by a private salt.
2) That ban message is not from 8chan, as OpenIB's (8chan's software) Brazilian Portuguese translation is different.
This board, /magali/, only has one Board Owner and no volunteers. As far as I know, 8chan does not have any global volunteers from other imageboards.
So, this thread is tinfoil.
8chan is structured like this:
Global Staff
https://8ch.net/glovols.html
Local Staff
Board Owners of local boards (all boards, except for a few global ones)
Board Volunteers (hired by BOs)