[proveanegative]

This way to leave is expensive to the employer in terms of the time lost before they realize you will not communicate again and a replacement must be found. Why did you choose to not communicate with them that you quit beforehand? I am genuinely curious because I have witnessed people quitting by suddenly ceasing all communication before and I completely fail to understand it. Note that this is not mutually exclusive with blacklisting their email address and changing your phone number.

[victorhn]

I guess it may be when you realize the absurdity of the situation you are on (they are incompetent, irrationally demanding, etc) and that you really would not lose much just cutting those people, also to avoid unnecessary awkwardness when quitting (this may be inteprerted as you are in an indirect way saying that they suck).

[yetanotheracc]

I guess it may be when you realize the absurdity of the situation you are on (they are incompetent, irrationally demanding, etc) and that you really would not lose much just cutting those people, also to avoid unnecessary awkwardness when quitting

Spot on.