(lighthearted)
It's fun to imagine there is some highly advanced civilization out there, with the capability to traverse the universe only to end up here and proceed to randomly fly around. It's also interesting that the influx of sightings started in the 1940s after WWII. After which military technology started to quickly advance, including ongoing numerous "top secret" projects that have continued to this day.
Back to the first part... why the heck would an advanced alien race really care enough to come here? Sure maybe at some point they stopped by just out of curiosity. But it seems like the majority of reports center around "flying objects", most of which have been flying around at random for the past 80 years. You would think after 80+ years of heightened activity that they would've been satisfied joy riding around doing whatever they do. Also if people were abducted, I assume they could've learned all of the information about the human anatomy from one person. I mean these are aliens that are able to traverse the universe, I would think they would have some pretty impressive medical technology.
But yet... they keep doing it. And to be honest I wonder why they don't do it covertly, why do their craft have lights anyways? You don't need lights when flying, perhaps when they land? I also have a feeling they wouldn't need lights to check out their surroundings if they do. AFAIK when people find crafts that land they are just hovering there. No one has ever report aliens with mag light's hiking through the woods. So why are they hovering there with bright lights? I would "assume" that their advanced, universe traversing craft would have night vision / sensors in order to land safely and not require flood lights.
Anyways, I don't believe obviously any extratresstrial lifeform has bothered to come here. We would be fairly primitive to them and nothing special.