The chance that we are alone in the universe is infinity small, however, the chance we will ever meet aliens are also very small, aliens that find us will most likely watch us from distance.
And having a great time at it. The stupid we as a civilization are.^^^ Life didn't arise. It was implanted. 
Panspermia, interesting.But wouldnt the "senders" check upon their development, unless they fucked their planet for good.