He has been punished for his wrong doing, which had nothing to do with DNS. The least ICANN could do it tell Sunde exactly what they are affaird he’ll do to misuse an accreditation. Some one with an accreditation sold Sunde and team piratebay.org, so they can’t be worried that he’ll register a ton of pirate domains, he can easily get those elsewhere.
People shouldn’t be punished for life, especially not by excluding them from areas that are completely unrelated.