In all likelihood, by the time any of our probes are found we'll either be long dead or we'll have advanced enough to the point we could defend ourselves.
And even without the probes, we've been inadvertently broadcasting our existence ever since our radio technology got powerful enough (~70 years). One would only need to follow these signals to the source (Earth).
Quite possible... Yup, those TV/radio signals going the speed of light...pointing the way like a beacon! I wonder how far away they can be picked up. Voyager is zooming along and could go much farther than a detectable signal.
but then again...some radio stations are over a million watts...they'll go quite a distance!
You know given the point an alien race would have to evolve to in order to go out and make contact with other races and the commitment it would likely take due to vastness of space, it seems highly unlikely they would come here to try to take over the planet. Or to just experiment with us like lab speciemens.
The logical thing would be to just avoid us given our nature.
You REALLY think so? We're trying to explore space. What do you think WE would do if we found something? what if it was "useful"? Do you think we/they would capitalize on it? "Domesticate" it?
We went through a LOT of trouble getting to the new world...how exactly did we treat the new found natives? I'd bet "alien visitors" would act the same. It's FEAR that makes your mind imagine "benevolent" aliens because the other would be unimaginably horrible.
Would they consider us anything special? Or, with as much dignity as we give to mold or bacteria? Or even out livestock.
Anyone with the ability to visit us regularly...is SO far beyond us that we wouldn't be a threat at all. Lke I said before...like the Europeans coming to the new world. Like US soldiers finding aboriginal people during WWII. Like you and I going up against a new born infant.
I'm a glass half empty guy in regards to aliens finding earth. I don't think it will end well for us.