A look at "pedophile hunting" vigilante Facebook groups, which stage real-life sting operations, some that are live streamed, to catch suspected child abusers (Hanna Kozlowska/Quartz)

Hanna Kozlowska / Quartz:
A look at “pedophile hunting” vigilante Facebook groups, which stage real-life sting operations, some that are live streamed, to catch suspected child abusers  —  Tony Blas is a plumber in his mid-thirties who lives in Queens, New York.  He has two young daughters.