I must ask the question,
With the distance aliens would be from Earth, Why would a alien come to earth?
1. It is looking for entertainment.
I refute this by Answering surely a species as advanced as its own has plentiful entertainment.
2. School Trips.
This would mean trips would be commonplace.
I refute this because any evidence of any Deaths would make this a place they would want to stop visiting.
3. Different weather from their planet.
I refute this because there are more planets that are similar to earth but without much life and therefor more private.
In short, there is little reason for Aliens with as high technology as described to visit.
No, not even to watch Jersey Shore.
I am not claiming Aliens don't exist.
I am claiming they wouldn't visit.
Besides, surely such an advanced species can hide cameras well and produce quality virtual reality.
Maybe some aliens are not that successful of having a good planet and they still look for ways on how they would make their place better.. Maybe they go here to learn more?? We really don't know much of what's on their mind(if they're satisfied.. etc) and if they're really advanced.. Maybe some aliens are more advanced than our planet, but you never know.. Maybe those flying objects are not that advanced.. Maybe there's much more.. Your claim is a bit weak, Okabe.