Problem is won't some of these VPS providers want to know a bit more about yourself beyond your e-mail and your visa number?
Also if one feels it acceptable to do so, he could forge the contact information. This would be against the TOS I imagine, but I think many services would be happy just to get the $$. It's not like this is a bank account which requires social security # and other verification.
Again, I don't condone illegal activity and use this knowledge for good!