The post isn't objecting to the firewall, though.

I totally understand the need for a campus-wide firewall. The MIT network is a juicy target for botnets, and individual students are not good enough at running security on their own computers. The old approach to IP assignment was that you needed to get your IP approved and made routable by IS&T anyway, and if they detected botnet activity on your computer, they'd manually intervene and make it unroutable again. That sounds like a lot of work.

If computers end up with firewalled but publicly routable IPv6 addresses, that sounds perfect.