[bjackman]

Well, there's still value in users and namespaces! Just, it's not a strong security boundary.

Also even if it's not strong, it doesn't mean it's entirely worthless. You can't rely on it, but it's usually free and it still buys you time / increases attack cost.

Like, if you leave 100k cash in a car on the street in SF, that's dumb. If you really need to do that for some strange reason, you should hire a security guard to watch your car, because cars a not a good security boundary. BUT, that doesn't mean you would leave the car unlocked just coz someone's watching it!