But if greys

or aliens that look like the emoticon are seen when people are on psychedelic drugs, is it because aliens are shown looking like this in films and in TV programs? I know someone who saw greys on Ayahuasca who were laughing and they showed him the big bang up until the present.
I do believe aliens or other intelligent life exists in the universe but I do not picture them as greys, Ridley Scott's aliens, the predator, etc.
Why do you say that greys are best avoided? I know they sexually abused Whitley Strieber, with a probe so is that why they are best avoided? If they supposedly abduct people when they are sleeping, how does one protect against them? Or do you view greys as harmful, negative or evil entities, or ones that like playing practical jokes? Or just manifestations while tripping?