No...like the camera being disabled for real unless you give the consent to use it....all that under the penalty of losing the 2 trillion dollar company reputation if you are uncovered doing otherwise.
This thing would only work at 2% of its potential unless you also give users an excuse to use the front camera much more frequently and move the ads from search towards the aforementioned front camera environment.
They have a whole lot of social engineering to do which has to go along with the proper engineering.
I guess efficiency and customization junkies would love a GoogleDocs UI which is optimized for their gaze so you can be upfront with them