People have been harassed by "Aliens" but they immediately went away when they called on the name of Jesus Christ (if you didn't know, Jesus Christ is the King of Kings and the Lord of Lords which only through Jesus you can be saved and has all authority in heaven and Earth). It's also interesting that people who have been communicated with these "aliens" are getting a bunch of Satanic New Age drivel not much unlike what the New Age gurus that you see on Oprah teach.

UFOs and Aliens are really demons. If it talks like a duck, walks like a duck... it's a duck.

I believe Aliens will be used to explain the rapture of believers of Jesus Christ. New Agers will say that they have been transported to another galaxy or something. Satan has been planning this for a long time.

I also believe a false alien invasion will be used to fool the world to attack Jerusalem: "And I saw three unclean spirits like frogs come out of the mouth of the dragon, and out of the mouth of the beast, and out of the mouth of the false prophet. For they are the spirits of devils, working miracles, which go forth unto the kings of the earth and of the whole world, to gather them to the battle of that great day of God Almighty." (Rev. 16:13, 14)

The frogs John saw could very well be the iconic gray alien. John wrote the Book of Revelation 2000 years, he didn't know any other way to describe them.