I think getting around bans is silk road. The operator seems pretty... hmmm, Idealistic? Get under Tor, trade some stuff with trusted escrow services, deposit cash account to account, it's not illegal to buy Bitcoin yet is it? Not a good way to do illegal trades, if it ever gets that bad, but I'm sure someone will figure something out.
Hey I got a great one, setup a Bitmessage exchange site, you can send as many messages as you like using a GPU, get a good automated service started and start trading, hell no one will even know where the hell you are, and it will take them figuring out SHA512, even with pre-image that's a monster to break.
probably just setup a Open Transaction Federation of servers over a territory, hell make them decentralized, anyone who wants to start one up can and join a Federation. Setup the OT server to act as a Escrow service under a contract to setup two transactions account to account with the legacy banking system,
I wrote this some time ago, could work if implemented properly.
I'm pretty new to this, but on one of the p2p exchange threads I thought this would be a great idea.
but it would be two transactions with 2 out of the three parties acting as escrow.
so A wants to sell their bitcoins
B is the escrow that accepts the risks they accept A's BTC
C is the person who is going to get BTC from B act as intermediary escrow and send a wire to A
It's two transactions
C sends the cash to A and authorizes A's BTC transaction to B
A authorizes the BTC transaction from B to C to complete the loop.
A has already transferred their BTC, B has sent their money and won't get their BTC until A gets the cash to authorize the escrow.
the two original parties are holding the triggers on each other and both have lost control of their money.
what do you think, yes I know the escrow assumes a lot of the risk, but that is why they charge a fee to offset any possible probabilistic losses, but the risk is low if a reputation system can be implemented. and yeah creating a three way p2p exchange still require the relevant p2p component to match local btc holders with local btc buyers and escrow intermediaries still need to be made and this system makes it a whole lot harder to match.
I found this in one of Satoshi's threads.
If you're still worried about it, it's cryptographically possible to make a risk free trade. The two parties would set up transactions on both sides such that when they both sign the transactions, the second signer's signature triggers the release of both. The second signer can't release one without releasing the other.
Edit: Hell you can go crazy on it and build it on top of a Namecoin domain, serving through Tor or I2P for maximum annonymity. Those obsessed with finding out who you are can't even check the volume of transmissions to find you, because the thousands of exchanges are exiting Tor from everywhere.
You can even take it to a whole new level if implemnting SHA-3 with only 1-4 iterations of the non-linear component, those configurations are reversible; They act like compression algorithms rather than hashes, just follow the keccak community to find out how. Anything after 4 iterations gets exponentially harder to reverse. Basically you can turn a 1000 page book, turn it into a 1024bit Hash string to be reversed later.
http://keccak.noekeon.org/