Hacker News on 31 October 2019

• I Accidentally Uncovered a Nationwide Scam on Airbnb
• Htop Explained
• NSO hacked WhatsApp to spy on top government officials at U.S. allies
• Restic – Backups Done Right
• The FBI Is Tracking Our Faces in Secret, and We’re Suing
• Build Your Own Thrust Vectored Rockets for Vertical Landings Like SpaceX
• Some Blizzard employees are dreading BlizzCon
• Zuckerberg doubles down on Facebook political ads policy after Twitter ban
• Deep Sleep May Help the Brain Clear Alzheimer's Toxins
• Grandmaster level in StarCraft II using multi-agent reinforcement learning