After submitting valid ID and proof of residence, Vice News began to buy political ads. But instead of saying that it had paid for the ads, Vice used other names such as Tom Perez, Islamic State and even Mike Pence. Facebook quickly approved every ad, rejecting only those that tried to list Hillary Clinton in the "Paid for by" disclosure. Further, Facebook allowed ads that repurposed content from 2016 Russian influence campaigns.

When Vice News reached out to Facebook about the issue, the company said that the ads shouldn't have been approved. "Inaccurate disclaimers have no place on Facebook and these ads are no longer running," Rob Leathern, Facebook's business integrity product management team lead, told Vice. "Our goal is to increase transparency on Facebook and prevent foreign interference elections, which is why we have implemented the authorization process and released the Ad Archive. Enforcement isn't perfect -- and we won't stop all people trying to game the system -- but we have made it much harder and we will continue to improve."

Vice News said it ensured its "Paid for by Mike Pence" ad didn't run, adding that Facebook didn't explain why Hillary Clinton wasn't allowed when other names were. Facebook did say, however, that the content of Vice's ads didn't break its rules.

This follows last week's New York Times report that noted someone was posting attack ads targeting Virginia Congressional candidate Jennifer Wexton, ads that claimed they were paid for by "a freedom loving American Citizen exercising my natural law right, protected by the 1st Amendment and protected by the 2nd Amendment." Facebook said that disclosure didn't violate its policies.

Both incidents go to show that an ad system that lets users hide behind whatever identity they care to present, isn't really transparent. A spokesperson told the New York Times last week that Facebook was working on improving the feature.