:Two reasons.  The first is the decision of "" to contact "".  They didn't overlap as editors (HK30 was blocked in May2006, Professor33 wasn't created until June 2006).  HK30 posted this "email" over at Wikipedia review.    Giovanni33 admits to being Professor33 even though at the time he denied it is as vocally as he denies his other, more recent, sock puppets.  Professor33 "contacted" HK30 for "help" to get unblocked.  The only other people he contacted were admins.  In the email and in other places, Professor33 published the material that HK30 was banned over. In reality, HK30 and Professor33 are the same person (according to MusicalLinguist as well) and he used the HK30 to publish the "email" at Wikipedia review.  It was practically the only thing that HK30 did at Wikipedia Review and he used that account because it was already banned at Wikipedia indefinitely.  here's more evidence  but you've probably seen this.  Giovanni33 has also admitted that ML was correct about his sockpuppets.  His denial about HK30 is not credible given all of his admissions, the evidence that link all the accounts he has admitted to, the coincidences and the material being published by his sockpuppets being so similar (including the outing information).