I hadn’t heard of the app NGL until recently. But that’s not surprising. The anonymous questions app seems to be largely popular among teens. Bark, the maker of parental content-monitoring software, calls NGL “a recipe for drama” and cyberbullying. But it seems like a fairly standard social media offering, allowing users to post questions or prompts and receive anonymous responses. Now, the Federal Trade Commission (FTC) has ordered NGL to ban users under age 18. That Slippery Slope Again The FTC and the Los Angeles District Attorney’s Office say NGL “unfairly” marketed the app to minors. “NGL…