We've entered into an era when self-defense is more important than outdated notions of politesse. In dating, for instance, it's usually advantageous for a woman to ignore (ghost) a man she wants nothing to do with rather than reject him, to avoid the argument or retaliation that may come with explicit rejection. Too many bad actors have changed the strategy. If you can't handle ghosting, maybe you don't belong in the job or dating markets.