"There are four core problems with Facebook’s new currency. The first, and perhaps the simplest, is that organizing a payments system is a complicated and difficult task, one that requires enormous investment in compliance systems. Banks pay attention to details, complying with regulations to prevent money-laundering, terrorist financing, tax avoidance and counterfeiting. Recreating such a complex system is not a project that an institution with the level of privacy and technical problems like Facebook should be leading. (Or worse, failing to recreate such safeguards could facilitate money-laundering, terrorist financing, tax avoidance and counterfeiting.)"
I couldn't agree more with that, but people worrying more about the personal data that Facebook could take advantage of, omitting the other possible problems.