Free internet isn’t that free. Groundbreaking LinkNYC public Wi-Fi kiosks, a joint municipal-commercial venture that launched last year, were intended as quick stopping points to check a map, find a local business or send a text. But after months of complaints about users watching porn on busy sidewalks and homeless people streaming whole movies, LinkNYC is disabling the kiosks’ internet browsers. Other features, including speedy free Wi-Fi, maps, and USB charging ports will remain. Meanwhile, other cities considering similar kiosks may learn by watching New York’s mistakes.