Mt Gox needs to use a third party for AML/KYC rather than do it themselves. There is too much incentive for them to simply claim documents are fake and block account holders because there is no transparency at all .
Its like putting the banks in charge of their own regulations through the SEC which caused the GFC !
MtGox doesn't need to do anything because it's regulated by it's customers (i.e. the free market). Just watch how fast they'll fall if they are stupid enough to start operating in bad faith.