The mathematical probability that man would find a way to instill his will on others has been long established. If you were forced to bet one way or another which one would you choose, a hands off policy or an interference policy? I'll bet the farm on the interference policy (for the good of the aliens of course). We may be explorers but we are also conquerors!!Finding intelligent life will be a disaster as you know man being stupid will stick his nose where it does not belong and want to change them in to democrats and republicans, Christians and Muslims and we will do it all over again.
We would be better off if we found a planet with no intelligent life and no dinosaurs.
The Aliens already have. They call it Dirball. We call it Earth.
This is kind of sad that so many people hate humanity. No wonder they don't believe it can do great things and explore. All the faith of the 50's and 60's is gone.