We humans are dual beings: we are a body and we are a consciousness.
As bodies, we are a physical object, and that gives us an extension and a mass, like all physical objects. We get hurt, we suffer cold and heat, we need to eat, we deteriorate and so on.
On the other hand, as a consciousness, by not being a physical object, you're immune to all of the above. If I were to cut all your limbs, that would hurt, sure, but your consciousness would be completely unaffected. I can't "cut" it like I can cut your body.
However, consciousness has its own set of vulnerabilities. Specifically, consciousness has one main weakness which overshadows whatever weakness our body may have.
We humans, as conscious beings, are primarily vulnerable to CONSPIRACIES.
We are born into this world with absolutely no prior knowledge. Everything we learn, we learn it from the outside.
Therefore, whoever controls the "outside" also controls the "inside" (i.e. our consciousness).
The only way out of this is to teach children that nothing should ever be taken for granted, and that if something seems too simple to be true, it probably is.
Being suspicious should become the natural state of humanity. We need to achieve what the ancient skeptics called Epoché: a complete "suspension of judgement" when it comes to the outside world.
That's the only way out that I can think of when "they" have complete control of the information world.