There’s an obvious and fundamental flaw to the idea that the detection of “fidgeting and glancing around” equates to mind reading. Just think how much fidgeting might be induced by the knowledge that fidgeting is being monitored.
Don’t people who are afraid of flying fidgit and glance around too?
I think the title for the article is incorrect in that it singles out a topic of one paragraph when the article really covers a variety of approaches - the most worrisome is the hubris of believing we’ll have a) a mind scanner and b)people willing to subject themselves to it.