Because it has a clear target and a very defined line. They can't keep doing it, that's the biggest part it stops. Mass surveillance has a definition[0]. [0]

Because it has a clear target and a very defined line. They can't keep doing it, that's the biggest part it stops. Mass surveillance has a definition[0]. [0] https://en.m.wikipedia.org/wiki/Mass_surveillance#:~:text=Mass%20surveillance%20is%20the%20intricate,monitor%20that%20group%20of%20citizens https://en.m.wikipedia.org/wiki/Mass_surveillance#:~:text=Ma....