If aliens are aware of us, you can bet your bottom dollar they have scientists studying us, peering into our little rock-pool. On a universe time-scale, we've literally just dragged our monkey-asses out of the trees, and are now capable of flying into space. For 4 billion years our planet had non-intelligent life. Regardless of how common life is across the universe, it's probably extremely rare to come across a planet at the same stage we are. Any self respecting alien scientist would be studying the shit out of us. Literally. With probes.