Nice try, Google. Yea just let me enable the permission to give you access to the selfie camera 24/7.
The best tech in this case could be snap picture, hilariously deformed and immediately shown on screen to that long-nose person. At least women will stop to watch in any available screen all around. Especially if this picrlture will show them very aged and ugly.
I don't need artificial intelligence to know if there is a possibility of someone else looking at the screen. If you want to have absolute privacy just leave the public place.
I think Google should focus more on important features and problems, like its bug-plenty Pixel 2 XL or Android fragmentation. This looks like a student project in high school.