This thread is a very clear demonstration of the libertarian bias of HN. The reflex, knee-jerk response to ANY proposal is "how do you enforce it??" regardless of the issue at hand.

You can ALWAYS claim that a policy proposal is futile, or will backfire, or will jeopardize some other freedom. The question is about the tradeoffs, which requires considering the evidence at hand. So many concerns being raised here are easily refuted by sentences in the article.