if the thing we have labeled "life" on this one planet, this one context on this one planet we use an example, exists anywhere else, and if this thing we can barely define in our own species as "intelligence", which we base entirely on one species as the default example of, has somehow arisen from that "life" somewhere else, and this "intelligence" uses anything like the same concepts as ours that would be able to recognize anything remotely similar to our concepts and symbols we use in our "intelligence" and they have some concept of responding to the electromagnetic spectrum that interact with this "intelligence", and they exist on any of these planets that has the possibility of ever detecting Earth, then sure, they may be watching.