You may notice he called those open issues. In other words, for at least the two reasons you cited, they are not solved problems. It's also not an unsolved pr

You may notice he called those open issues. In other words, for at least the two reasons you cited, they are not solved problems. It's also not an unsolved problem, since communication using IP protocol means that someone must assign you an IP, and those assignments can be logged... similarly operating a proxy server means that you are a target for government and court subpoenas, and in some jurisdictions it may be mandatory to maintain these logs and produce them on request, regardless of the sometimes in-feasibility of that. The internet is really just a series of tubes.