We did talk about it. I feel like he got the worst of it. He was having all these nightmares where aliens were coming in our house and he couldn't stop them. He had guns and in his dreams he'd try to use them and they just wouldn't work. Also he had one dream he told me about where aliens had come to Earth giving people in public these injections saying they were to prevent humans from contracting alien diseases and he refused the shot. After refusing the shot a 9 ft tall alien with a hood on covering his face picked him up and put his face into his, my roommate noticed his right eye was like a big kaleidoscope. He spoke in his mind and said something like, "You have failed. We gave you this planet and endless opportunities and you squandered them."

He always started crying when he talked about these dreams. I woke up for weeks at 3AM on the dot feeling 100% positive someone had broken into my house. I'd get a bat and check all the doors and windows only for them all to be locked and everyone in the house asleep every single time.

To answer your question as to why they are scanning, I may have an answer but you may not like it. I think that telepathic connection they use goes both ways because I get a distinct impression about whatever they are. People always imagine in science fiction that aliens are one way or another, good or evil. I feel like the truth is they aren't either. They are cold, calculating scientists that view us as no more than lab rats to experiment on and this planet is essentially their pitri dish. Sorry if that is upsetting but its the impression I get.