The mods are privy to certain statistics about users that others do not have. Goma is an unusual case of somebody who goes above and beyond to continue spamming Programmers with garbage.
He has used over 50 unique IP's most of them behind proxy servers located in Saudi Arabia. He has opened multiple SE accounts with numerous unique email addresses. Previous attempts at notification and suspension have simply resulted in him changing IP and email address.
He leaves a pretty reliable pattern though, almost always IP address that originates in Saudi Arabia among other tells. His questions are easy to spot too.
I believe we keep this account open and merge duplicates into it so that we have a single consistent record of his activities for study and future consideration. This is why he has posted so many questions -- because many of them were on duplicate accounts that we had merged into Goma.
"I am getting fat every month and I just still at home.":P