I feel honored you would resurrect a 3 year old thread just for me. Sort of scary how much you think about me.
The answer to your question is NONE. Thus the reason I do not support any new laws or regulations and think we already have too many.
But your question brings two things to mind....
First, it is terrible logic and I makes me cringe when people use it. The same can be said of any crime. There is no law that stops anyone from driving 100 MPH down a city street or stops anyone from robbing a bank or committing any crime. Should we use your logic and get rid of all laws since they do not stop someone from doing harm?
Second, there is no law/legislation that removes drugs from the possession of those that want to use them. Yet you strongly support laws that try and do that. You are basically a two faced hypocrite