I use facebook mainly for my organizing and advocacy work and cannot afford to be associated with "bottom feeders".
I have no qualms unfriending and blocking toxic people on Facebook.
I did it very recently with a coworker who always has some drama going on on her page and feeds even though it has nothing to do with me. Why? because sooner or later, she might share her nonsense on my page and try to drag me into the madness.
I have no qualms blocking people's texts and calls either if they are stressing me out.
I have learned to prize my peace of mind.