LA Times: How HBO’s ‘Gasland’ documentary hit the natural gas biz where it hurts Amid my column Monday talking about the latest hot-button documentaries, I found myself wondering, for all the media attention lavished on controversial documentaries like “Fahrenheit 9/11,” do they really change anyone’s minds “” or do they just preach to the converted? I mean, if “An Inconvenient Truth” really raised people’s consciousness about global warming, then why have recent studies found that fewer people …