Not very nice, but I fail to see how this is invasion of privacy - as it's not "real" data, but "review" data.
Let's say I go out with some girl - and I rate her as a 7/10 face, 8/10 body, 2/10 personality.
I share that on whatever it's called app.
Someone else does the same - you get aggregate ratings, like Tripadvisor or something.
This is not a nice thing to do, but it's not an invasion of privacy. None of that data was confidential to begin with, and is not "secret" and owned by the subject. These are a series of rankings invented by other people - and apart from anything else are wholly subective. Even if it were to include things like physical measurements - these are likely to be guesses.