In a letter sent to the Drug Enforcement Administration on Friday, chief security office Joe Sullivan chided the agency for allowing one of its officers to lure criminals with a fake Facebook account created in a suspect's name. "We regard the DEA's conduct to be a knowing and serious breach of Facebook's terms and policies," writes Sullivan. He adds that the social network "asks that the DEA immediately confirm that it has ceased all activities on Facebook that involve the impersonation of others or that otherwise violate our terms and policies."

The issue came to the fore earlier this month when BuzzFeed reported on a case filed in a federal district court. The suspect, 28-year-old Sondra Arquiett, sued DEA agent Timothy Sinnigen for violating her privacy and putting her in harm's way. In court filings, the DEA admitted that Sinnigen used photos obtained from Arquiett's cell phone to create a phony Facebook account.