Stranger Things’ spoiler tweets reveal the nightmare future of marketing

Remember in Minority Report, when Tom Cruise’s character tries to lose some pursuers in a crowded mall, but the sophisticated advertising technology of 2054 keeps identifying him by name and trying to sell him things? It’s a funny gag, and a useful plot point, since it means he can’t go anywhere without wall-holograms ratting him out to his enemies. But it’s also meant to be the sign of a dark future dystopia, where privacy has disappeared, and facial-recognition scanners