create a honeypot ID and use that as a disposable cost of anonymity. i'm assuming that a suitably motivated person can find a passport and then create a persona around that. then you can use all the 'normal' channels but there is a name to go with them, a credit card, an email etc. the fact that it's not you is the whole point. i think it's shneir that said it's not identity that's important, it's intent...