This is a pity. Ahlfors was not spamming. Just proposing evidence that was hidden in plain sight, for others to ponder on. This has been the style of other Rossi-addicted mathematician bloggers for years. Not that I share his/her views nor do I always understand what he/she hints at. But I don't see what was reproachable. If there is a public record of Fabiani having an office space in the same dept as Roland Petterson it is an interesting find.
The job title is likely self edited thus not significant.
It is a self-ban following the warnings if I am not mistaken. If Ahlfors has the same personality as the other mathematicians we will never see him again whatever apologies are made.