This is exactly why you should not use exchanges like BitInstant, CoinBase, CaVirtex or MtGox!
Charlie Shrem is going to provide all financial records of his customers to the FBI and IRS. Goodbye Bitcoin, Hello IRS. Did you buy significant amount of bitcoin through BitInstant? Expect a knock on the door. Good luck.
Instead of using these government-compromised exchanges, try the anonymous exchange
https://CoinChimp.com and the anonymous Bitcoin debit card
https://BitPlastic.comWe do NOT store client information!
You should make sure to retain an attorney before you launch this.
What you are talking about is the literal definition of money laundering.
KYC isn't a US requirement. It's a world wide thing. If you aren't collecting and retaining enough info to identify your customers to the feds (or tax authority of any country), then you will end up just like Liberty Reserve who had a very similar thing going on.
http://en.wikipedia.org/wiki/Liberty_ReserveThey weren't even in the USA and I don't think that even slowed the feds down.
Best to try and be legit. No one should be using crypto's to try and dodge taxes there are plenty of loop holes in the US Tax code that no one needs to pay very much in taxes if they structure things correctly. Plus it's above board, clean and legal.