I'm sure there are some wonderful technical solutions involving statistical analysis, measuring velocity (user connects from country A, then 10 minutes later co

I'm sure there are some wonderful technical solutions involving statistical analysis, measuring velocity (user connects from country A, then 10 minutes later connects from country B; flag the IP address), and so on. But there's a much simpler solution with no chance of a false positive [0]: Netflix spends a few dollars signing up for each advertised VPN service, then they instantly block any IP address that the VPN service attempts to route them through. [0] As long as legitimate Netflix customers aren't sharing their connection with the VPN provider.