[Dou8Le]

The lie detector test was an example of junk science that still can be used to produce a desired result. Not meant to imply that people will use a "gaydar" to try and get people to confess to crimes. My mental contrived example was that homophobes in a homophobic community might doctor up such a system to try and convince other people in the community that someone they don't like is gay and should thus be ostracized, but I realize it's a stretch.

Potential harm can certainly arise if the research is junk. People misuse research or believe in junk research all the time. Just look at the anti-vaccines crowd.

I agree on your third point.