That being said, I'd imagine it has to do with the logic, that the majority of donators and VIPs aren't going to pay the money to get the title, and then cause trouble and get themselves banned. They have a financial stake in their account, so it would make sense that they would be more conciencious.
Percentage-wise, more Donators and VIPs have been banned or SCAMMER-tagged than the rest of the bitcointalk-crowd, I guess

what donors/vips got banned? and why? i find that funny.