On the one hand, I would love the idea of the companies running such services to be incapable of accessing my data. (No, I am not concerned that this would mak

On the one hand, I would love the idea of the companies running such services to be incapable of accessing my data. (No, I am not concerned that this would make clear the tenuous nature of their business model.) On the other hand, I've BUILT such services. And I know users. There are a great many users out there which practice the most aggressive and astonishing levels of stupidity when it comes to their own life. I mean, it's breathtaking. It can tempt some people into active pursuit of genocide, simply to erase the shame of sharing a species with such people. But... if you are going to build a service used by the public, you really have to face the fact that these ARE the people you wanted to be useful to in the first place. And with that, you had better be able to log in as them without asking anything more than just their name. Anything else is simply far too high of a cognitive load to place on them.