Have you ever left a bad situation or place and never looked back?

Some examples: You lived in a town that you were bullied in as a kid. You grew up and never kept contact with any of those people once you moved away.

Another: You moved to the city and everything that happened there caused you to basically have a nervous breakdown. So, on good advice you left to start a new life.

Have you ever left a situation or place and totally obliterated the experience is terms of concrete links. Never contacted those people again and have decided not to mention it to anyone in your new situation.

What do you think are the pros and the cons of such a decision? How do you think deciding to keep the memory and the people alive or obliterating them helped or hindered you? This could translate into a place or a situation.