Remember how the Justice Department decided it was just fine for a Drug Enforcement Administration agent to steal a woman’s identity and set up a fake Facebook account to chase subjects? Well, Facebook’s not OK with that. In a letter sent to the Drug Enforcement Administration on Friday, Zuckerberg & Co. have made their position very clear: if agents want to use the service for whatever reason, they have to use their proper name. “We regard the DEA’s conduct to be a knowing and serious breach of Facebook’s terms and policies,” explains security office Joe Sullivan in the letter.