It's currently ranked against what makes Facebook the most money with a secondary ranking of what advertisers want to use to target a demographic. The algorithm is fine. The marketing creeps opting to use teen girls to advertise to 55 year old men should probably change and Facebook should probably have better moral standards as well.

It's like seeing parents that sold their teen daughter to a pimp and the pimp selling the girl to an old dirty man, then asking how we can change human reproduction to prevent this. It's the society that has accepted "Sex Sells" as a moral business practice that should be changed, but anyone that attempts to do so gets labeled a puritan and dismissed.