[DextExexy]

Some regulation is required. If you take a Libertarian approach, you are free do until your actions infringe upon other people's liberties. Dumping mercury in the water is definitely infringing upon other people's liberties and a free market would have no solution for this except for legally recourse, which would be too late. Similar to Hoffa, I hate the EPA, but it does serve a purpose. In the case of free markets, once your actions infringe upon a free market, a free market ceases to exist. For instance, insider trading or a monopoly. That gives people an unfair advantage. I guess it is where you want to draw the line...