"They're too primitive yet...we will orbit them with an invisible camera for now and maybe make contact in 10000 years or so."
Are you suggesting giving us that much time to evolve into something better, or waiting for us to ultimately wipe ourselves out so they don't have to when they move in?
I would imagine we're so far down the list it really doesn't matter...
It would be trivial to wipe us out. Any civilization capable of travelling interstellar distances is obviously significantly more technologically advanced than we are, yet even at our level we have to be careful not to accidentally wipe ourselves out.