To be fair, Herr vonhelmet, deadly force can be legal so long as that is proportionate, but I think you meant, e.g., deadly force as a pre-emptive strike on an unarmed trespasser for example. Do the people advocating no restraints following a trespass really believe that a householder should be able to get mediaeval with a hammer and pliers on a frightened and unarmed 14 year-old burglar? If you believe force should be proportionate to how you perceive the threat, that is already the case.
I can't really be bothered to go through all the law already protecting the householder again - such as judging him on the facts as he believed them to be, taking into account that he cannot weigh force to a nicety in the heat of the moment etc. If people want to rant about how what the law isn't should be changed to what the law already is, then so be it. It is rather sad though that people so often believe tabloid lies about the state of the law and then fear for themselves as a result.
I can't really be bothered to go through all the law already protecting the householder again - such as judging him on the facts as he believed them to be, taking into account that he cannot weigh force to a nicety in the heat of the moment etc. If people want to rant about how what the law isn't should be changed to what the law already is, then so be it. It is rather sad though that people so often believe tabloid lies about the state of the law and then fear for themselves as a result.