One thing that stands out in my mind is the ability for someone to make himself invisible or unidentifiable to you by hacking your eyes. If someone can take control of your sensory inputs, they can put you into the "dark dream" to test, model, and eventually control your behavior.

When your eyes are hackable, you cannot take the VR headset off. Even closing your eyelids won't help.

Would you want anyone besides yourself having authorized access to your sensory bus? Would it make you feel any better if the person doing it had a valid court order?

  Would you want anyone besides yourself having
  authorized access to your sensory bus?

Banks' Culture novels touch on similar topics. In Excession, a Culture warship comments how the brain-computer interface (in-universe called a "neural lace") is the most effective torture device ever devised. And in Surface Detail, a firefight turns on the fact that Culture warships write their own completely-customized operating systems, with this heterogeneity making hacking attempts more difficult and consequently less successful.

GitS illustrates the danger of humans integrating with computers too closely ex. Cyberbrain hacking, stand alone complex, etc https://en.wikipedia.org/wiki/Philosophy_of_Ghost_in_the_She...

It's fictional but there's a lot of truth in no matter how important or shielded a target is, it is always vulnerable to attack.