Sounds like the Game of Thrones crew is absolutely willing to go to extreme measures to prevent season 8 spoilers.
According to Sophie Turner—who plays Sansa Stark on the HBO drama—the production team deployed “drone killers” to disable any camera drones attempting to capture footage of the show’s sets during filming for the final season.
“If a drone flies above sets, there’s a thing that can kill the drones, which is really cool,” she told Entertainment Weekly during an appearance at New York Comic-Con. “It creates a field around it and the drones just drop. It’s very X-Men