FWIW, I'm not saying we must have a perfect solution: I'm saying that we have to build systems which make the implicit failings of their imperfect solutions exp

FWIW, I'm not saying we must have a perfect solution: I'm saying that we have to build systems which make the implicit failings of their imperfect solutions explicit. As an example, it is impossible to build a system which gives one person access without permitting that person to lend that access to others: we need to acknowledge that rather than pretend it's untrue.