When I was younger I used to try not to subvocalise (?) my computer passwords, thinking that might stop someone reading my mind. Might start that again

Nasa had an article[0] back in 2004 where they could detect what you were saying with sub vocalization on the skin and were already working on technology to read it through cloths back then, so not to get too tinfoil hat but that might not be all that bad of an idea.

[0]https://www.nasa.gov/home/hqnews/2004/mar/HQ_04093_subvocal_...

Or vice versa, thinking verbally with intent for external apparatus to receive the thought.

How, how many faux pas and freudian slips would occur while people get used to the system! I suspect they will be looked upon similarly as typos are today. After all, you don't have to press send until you're happy with what will be delivered (and if any service doesn't, then they'll quickly be abandoned by their customers).