Why is it when people see something strange they assume the most improbable scenario about it? And notice one thing about all these paranormal phenomena, these people project an intelligence onto whatever the cause is, whether it is a spooky ghost or alien or angel or demon. People have some need to assign a will onto whatever is happening, which is a story as old as humankind. It basically animism, like the first religions. It must be some kind of instinctual predisposition. Whatever the weird phenomenon, it's never a quirk of physics or chemistry, no, it's always something someone else is doing to you. Notice how that makes the witnesses the center of something or somehow special.
And no, aliens aren't visiting us, sorry. There is no way aliens would even know about us. We have only been projecting radio waves off of the planet for what, 80 years? How many planets lay in a 80 LY radius? And at 80 light years, those waves may be indistinguishable from background noise anyway. As far as travel goes, there isn't even any practical theory about how one can sustain near-light speeds, let alone exceed them. It is really looking like the speed of light is a genuine limit of the universe, and if so, we will very likely never meet any extraterrestrial life. It's also extremely probable that, in the remote extreme odds that we do meet extraterrestrial life, it will be just bacterial mats or microbes. Keep in mind that for the majority of Earth's history, life was just bacteria. It wasn't until relatively recently that life started to get into multicellular structures, let alone things like hands and feet.
Truly, profoundly strange things exist, enormously curious things, but they do not go 'Boo!' at you.
