The consequences of isolation can be severe

People use silent treatment because they get away with it without looking abusive to others. It is very effective in making a specific person feel bad. It is controlling and prevents both sides from weighing in.

Passive personality types may use it to avoid conflict, while strong personality types use it to punish or control. Some people unconsciously use it because they can't put their feelings into words, so they shut down. However, the silent treatment causes stress. In the long run, the stress can be considered abuse.