ouch
Dear Mt. Gox Customers,
In order to comply with strict anti-money laundering regulations we are now requiring account verifications for all accounts performing non-Bitcoin currency deposits and withdrawals. Please see our statement for the full explanation:
https://mtgox.com/press_release_20130530.htmlBest regards,
Mt. Gox Team
Well, just all wait till the day MtGox get hacked (again) or seized by government. Suddenly, all those Bitcoin addresses used to fund/withdraw will be cleanly linked to your ID, photo, bank account, postal address. Nice.

This is a real risk everybody trading significant amounts of fiat for BTC is exposed to - now and also in the past. If you are dealing with peanuts, you can get away with dealing with BTC anonymously. But if you are trading high 6 figures of fiat (and those guys, together with the 7 figures players are the market makers, and not the Dwolla users) you need to be ultra-verified with notarized documents in any case.
I think people moving millions are probably working with special agreements with GOX. Their money isn't going 'poof' overnight anytime soon.
I think the REAL question no one is asking is when exchanges are going to be forced to play bitcoin police for stolen BTC. That's the real question.
Maybe some of the people dealing with millions have some "special agreement" with Gox, but I can guarantee you that at least some of those dealing with hundreds of thousands are not.
And consider that there are a lot of people in here whose bitcoins were worth let's say $30,000 6 months ago, and now those BTC are worth $300,000. That people needs to be registered with notarized documents + apostille if they want to be able to withdraw more than $10,000 per day (and $50,000 max per month), which is a pain in the ass because you also lose a lot of money in commissions (Gox's, Gox's bank, your own bank... You just want to withdraw as much as possible in one shot or you lose money).