It would make a lot of sense. The fact that currently there isn't a single unique identifier per online user allows for an unregulated environment. Obviously, there are things like IPs, the mobile device identifies (phone number...) or even single-sign-on platforms but the bottom line is that there isn't something that is unique per user and platform independent. Should there be a unique credential per user just to access anything online? From the security perspective, you would definitely say yes but you could also imagine that this could be taken too far
http://uk.businessinsider.com/how-china-is-watching-its-citi...