If Elons neuralink is commercialized in such a away that the 'o' of the i/o can be broadcast at the same speed that the input can receive information, then whatever external third party machinery that is used to interface with this technology would have to be trusted.

Ultimately, it can not be trusted. People will have to make a hard decision to miss out on the awesomeness of the new technology or submit to having your brain's data harvested at the speed of thought with each and every use of the device.

Peering into the future as I imagine it, Musk is creating a device to not only access the internet of the mind, but also interface with it. He's just creating the Ethernet port. Meaning, whoever creates the machine's that will connect to it wirelessly will have access to your brain's data.

They will take the cancerous app model that was first introduced in cell phones, that ended up spreading to windows and metastasizing in the human psyche, and use something like that to communicate with the neuralink.

Each time you install a new application like 'Learn Spanish in 2 minutes', You'll have to let that device read your brain while you watch a trailer, or solve a mini game puzzle or something to that effect, while they harvest your thoughts on the matter.

People will want all these free apps, there will be a price. Even the paid apps will require something extra from you. By then people will be so conditioned to simply blindly agree to everything, that they won't give it a second thought.