The thought screen helmet stops aliens from abducting humans. It's a tested device that works.(source)
So how does it work?
The thought screen helmet blocks telepathic communication between aliens and humans. An abductee who took voltage readings from a second helmet while wearing another one demonstrates that this communication is a form of electromagnetic energy.
Aliens cannot immobilize people wearing thought screens nor can they control their minds or communicate with them using their telepathy. When aliens can't communicate or control humans, they do not take them.
An how do they know it works? Testimonials, what else.
The thought screen helmet has effectively stopped several types of aliens from abducting or controlling humans. Only two failures from standard thought screen helmets have been reported since 1998. A third failure in 2005 was from a cloth helmet with a smaller square area of Velostat and a Velcro strap which was easily removed by an alien hybrid.
The link of this claptrap to autism was first revealed by a reader over at Skeptico's blog. (One of my favorite blogs, BTW; incidentally, Skeptico has Asperger's). Over at stopabductions.com they have a list of "case histories" of thought screen helmets. One reads as follows.
The woman’s son, age 8, starting wearing a #3 helmet. Previous to the helmet he was diagnosed as autistic, had reoccurring nightmares of what he said were monsters, and told his mother that aliens told him to obey them. He has not been taken while wearing the helmet and his doctors report that his autism has improved markedly. However, he reported that he was abducted on his way to or from school. He had several unexplained marks on his body and told his mother that he had surgery. A neurologist who examined the boy said he has an abnormal EEG.
(source) (Emphasis mine)
Abnormal EEG? Wow. Surely, alien thought control ought to be causing that.