I'm a Singaporean and I thank you for sharing about Singapore. The purpose of automatic frosting up of the LRT window within 6 meters of residential housing is indeed to protect the privacy of the people living in the area. In Singapore, no cameras are allowed to be placed in areas that can potentially invade the privacy of the people living in their houses. You can share this with the person who told you that there's no privacy in Singapore due to cameras everywhere. 😅