Ethically-challenged people, yes.

Whenever I'm in the middle of a conversation and I ask the person how do you feel about talking with someone who suffers from mental illness..
If I get "radio silence" for a long period of time.
I respond with "your silence speaks volumes. I feel the same way about talking with ethically-challenged people. So I'm gonna say goodbye. At least unless you see a counselor of some kind. And learn about codes of social obligation.