By accepted online transaction systems I assume you mean visa, paypal, dwolla, etc. In that case two points 1) If you are willing to accepted centralized syste

By accepted online transaction systems I assume you mean visa, paypal, dwolla, etc. In that case two points 1) If you are willing to accepted centralized systems , than my second citation gets you complete anonymity. 2) At least with those systems, your information isn't public to everyone.