The world is so much more complicated than this. Everything Joshua Morton said but also: What is identity? A name? An SSN? How do you verify that for people i

The world is so much more complicated than this. Everything Joshua Morton said but also: What is identity? A name? An SSN? How do you verify that for people in all the countries of the world? How do you do that at scale? With hundreds of millions of users, you can't exactly call them up. How many users are you going to have after you start adding measures to verify their identities at signup? How will the board of directors feel about that? And feel free to run your own company into the ground doing the right thing, but there are other email providers in the world who will happily accept the users you drive away. What happens when people have their accounts taken over and start spamming? Were the accounts ever "real"? How can you even know? What happens when the reports themselves are spam? Spammers will report other spammers to remove the competition. Or they'll just overwhelm it with useless fake reports to DOS your human reviewers. You have to realize that every input to your system is a potential avenue for abuse. There are people sitting there all day thinking about how to prevent you from achieving your goals. Humanity went to the moon, we're problem solvers. If there's a way to manipulate and undermine your spam defenses it will be found.