I cant help to just sit here bewildered by your question.
First of all how would it be even possible for us to come to such
a conclusion. The chances of that are just too astronomically absurd.
Its a good thing to have an imagination, but some people should
really learn when that imagination ends and when reality ensues.
I lean more on the side of believing in extraterrestrials. But just like
a previous poster said, if they really wanted to intervene they would
be extremely obvious in their ways. Not so covert that we'd mistake
their intentions for something that happens naturally on earth every day.