Actually, their work seems to be focused on dispelling the common disbelief in these kind of applications for technology.

From the abstract: "Additionally, given that companies and governments are increasingly using computer vision algorithms to detect people’s intimate traits, our findings expose a threat to the privacy and safety of gay men and women."

Acknowledging that data analysis can create obstacles to freedom or serious social problems is a necessary step to preventing or addressing these issues, but public opinion is far from being there yet...