That's not a solution, it would be way worse. Companies would then make automated decisions and associate them with your personal ID, and spammers/DDOSers would

That's not a solution, it would be way worse. Companies would then make automated decisions and associate them with your personal ID, and spammers/DDOSers would be spending serious effort to hack their way to using the IDs of innocents. So rather than just your home network or whatever getting a sh*t reputation with no recourse, you would.