Earlier quoted context omitted.
What exactly is polite about lying? It seems like an easy way out instead of the right way out: just telling somebody you're not interested.
This is a very good example of male privilege. What comes to mind as the first thing that would happen as a result of this? Most women are smaller than the men that hit on them, and are constantly told they need to be vigilant against assault (this is a consequence of victim-blaming, which is wrongheaded, but nonetheless psychologically influencial). A woman saying "I'm not interested" is directly rejecting the man h…
Also, I don't necessarily see vigilance against a potential attacker as wrongheaded. I see it as sensible, you're hedging against a very-low-probability but very-dire-consequence risk. No matter how close we come to complete gender equality, there will always be mentally disturbed persons who will attack people weaker than them. (Note that I am not saying that most assailants or rapists have mental disorders, it seems the research says only ~ 10% do.)