You misunderstand. I don't mean an HTTP proxy, I mean a computer with no keyboard (technically, a keyboard usable only in a small whitelist of places). There ar

You misunderstand. I don't mean an HTTP proxy, I mean a computer with no keyboard (technically, a keyboard usable only in a small whitelist of places). There are a small number of loopholes left (assembling messages with copy-paste from the right-click menu, and finding a website somewhere with an on-screen keyboard) but they're pretty easy to either close or to enforce with a small amount of human monitoring.