AIDS: Does It Make enough Sense to Stop Fiddling with Nature?

After reading articles from BBC on Guinea Pig Kids and "The Gay Experiment That started AIDS in America" - do we still need to believe that we can beat nature?
With the half baked knowledge about things around and not a speckle of knowledge on what is life - WHAT RIGHTS DOES MAN HAVE IN THIS WORLD TO MESS AROUND ALL OVER THE UNIVERSE?