Delete or not?

Is there ever a good time to delete a comment from your Facebook thread?

Delete based on your own Facebook code of ethics. It’s your page.

My own prompts for hitting the delete button:
1. Prolonged argumentative scribblings.
2. “Jokes” that rub me the wrong way (violent, racist, sexist, etc).
3. Anything that puts my BIDNESS out there without my OK. I like to embarrass myself on my own terms.