A TikToker shows up to a 6 a.m. Solidcore class and the place is basically empty—no front desk, no instructor, lights off. He even gets a text saying the class is canceled… and he just ignores it.

Graham Kates is an investigative reporter covering criminal justice, privacy issues and information security for CBS News Digital. Contact Graham at KatesG@cbsnews.com or grahamkates@protonmail.com ...