Earlier quoted context omitted.
Between this and the T-Mobile IP ban, why not just say "Only registered users can edit pages" and be done with it? When you're blocking millions from unregistered editing, just go full tilt.
Because blocking millions out of billions can still be a reasonable tradeoff, if majority of abuse comes from those millions.
What I feel does not make sense is pretending that you're "open" when you stifle millions of (innocent) people. To show the escalation, there are people who would gladly round up millions out of billions to throw in jail or murder for the sake of the safety of the rest of the group. And it would be reasonable to them because it provides the billions with safety. But I think its extremely reasonable for the millions (and in particular the innocent among them) to complain that "this isn't really the open, free, democratic society you promised and maybe you should admit that at this point".
TL;dr- Let's stop pretending Wikipedia is open to all and isn't about Wikipedians controlling Wikipedia.