If UFO's are really alien spacecraft....?

Obvious reason is no ET's can come here, if any could come astronomers see them, people not know what they see, see planet, airplane, balloon, ball lightning, etc. believe is ET's spaceship, only people uninformed of astronomy and relativity believe ET's come here.

Because US AMateurs use cheap plastic telescopes that can't see sh!t if it was smeared on the lens. And aliens only visit every once in a while kinda like relatives coming over for christmas dinner unannounced when you haven't seen them for 2yrs.

They also don't come in droves cause of the intergalactic treaty 678 par 54.1 that states that only designated space crafts with proper permits and cloaking technology are permitted to fly, land, hover and or be seen by the planets native populous at certain designated intervals(dates on native planets rotational calender), time of day/night and in or around populated places.

A lot of astronomers says they've seen some UFO, and often the UFO'sightings on newspapers are by amateur astronomers.

It's true.

Lots of people see UFOs and it doesn't mean they are space craft it just means they are an unidentifiable flying object at the time they are observed.

Oooh, let me guess! It could be that there's this huge government cover up, or maybe they are in denial about being afraid of something they don't believe exists ;)