It must be a certain type of people who are apt to believe things like this. There are plenty of people who believe vaccines cause autism, despite all evidence to the contrary, and there's a whole plethora of conspiracy theories that we might never dispel.
I think these things come from a place of fear, and I think there's distrust of anything to the contrary baked into that. People are all good at justifying their biases and ignoring evidence they don't agree with. I don't think this is caused by people not knowing much about technology, but I think ignorance of technology makes people susceptible. For example, anti-vaxxers' ignorance of medicine and scientific process lets people exploit the natural desire for their child to be healthy (or fear that they won't be healthy).