The problem I have with this discussion of if there is life put there or not. Is humans always think that they are the first and any civilization they find can't possibly be more advanced. They also believe it would be impossible for a more advanced civilization to be able to visit earth.

I say that even with carbon dating and such, its impossible to find how old the universe truley is. Outside of our observable range it could be older or younger. Outside of our observable range there could be lots of intelligent life and interstellar travel. Or there could be none of that.

For all we know intelligent life could have found us already but they are waiting to be known because of how war happy humans are. There are so many possibilities to what exists and what can exist that this is basically a mute topic that has become like religion. Each their own and that's all.

Personally I think there is intelligent life visiting earth already. Being stealthy and watching. Humans do this with wild animals, darts, sleep, tagging, put back, observe, repeat. I wouldn't be surprised if intelligent life not from earth is doing the same.

Many people forget, to a higher intelligent life form, we probably look like breeds of dogs or monkies. And to us, dogs and monkies look like dogs and monkies.

A lot of people try to argue that a civilization that intelligent would know better. They forget that that civilization evolved like we are evolving now. With variations too. But still, there is no guarantee that some intelligent life will be that helpful.

We have space travel and we still have war mongering nations. Granted its primitive, but in 1000 years the travel could improve but the behavior may stay the same.

They might have last not to interfere. They might watch and expierement. To them we are possibly an opportunity to observe a different primitive civilizations evolution.