YouTuber and Roblox content creator going by the handle “Schlep” was recently banned from the platform after he took matters into his own hands, catching predators Chris Hansen-style.

A lawsuit has been filed against Roblox, claiming a 13-year-old girl in St. Louis was exploited by a pedophile.

Roblox Corp. shares fell more than 6% Friday after the company, which operates an online video-game service popular with ...