This is reading peoples thoughts,
No. It. Is. Not.
http://www.vipassana.com/meditation/beginning_insight_meditation.php
Why have you linked this? Subvocalisation is not mentioned.
If you really want to harp on the word "thought" just switch the word "subvocalize" in place instead or whichever word we can come to an agreement to use.
That said, I'm not meaning to equate subvocalization to all thought; I'm saying that Subvocalization is one instance of thought, or at least the manifest ion of such an instance - and it is one that can contain particularly private information. Many medical conditions affect this as well. Its not reading *all* of peoples thoughts, just some, namely those involved in subvocalization.
Many people are not aware of their subvocalization (especially when in a fatigued state); thus they could betray themselves, reveal private information, be manipulated, or otherwise be put into a morally suspect position. Many others can not control their subvocalization. This leads to the naive idea that your inner voice is due to the "Holy Spirit" or conscience.
Do you really think it is right to build technology that reads conscience?
Empty mind meditation does rely on the removal of subvocalization - your inner monologue, the chattering monkey, etc. Obviously, buddhism is not going to be using the same terminology.
NASA has no business doing this research. The gain is minimal, the cost is high (both in moral terms and in monetary terms) and they are an organization that deals with space research, not improving technology that is already suitable for their purposes. They are wasting tax payer money. The blood, sweat, and tears of the working class is fueling their useless and morally suspect research ends.
Those that believe in a conspiracy could likely think of many reasons they would not like their inner monologue revealed.