Per http://serverfault.com/faq#editing

Other people can edit my stuff?!

All contributions are licensed under Creative Commons and this site is collaboratively edited, like Wikipedia. Edits are tracked in public revision history. If you are not comfortable with the idea of your contributions being collaboratively edited by other trusted users, this may not be the site for you.

That said, we do encourage non-trivial edits, that is, edits which make a post substantively better in a few different ways.

http://blog.stackoverflow.com/2009/04/in-defense-of-editing/

Per https://serverfault.com/faq#editing

Other people can edit my stuff?!

All contributions are licensed under Creative Commons and this site is collaboratively edited, like Wikipedia. Edits are tracked in public revision history. If you are not comfortable with the idea of your contributions being collaboratively edited by other trusted users, this may not be the site for you.

That said, we do encourage non-trivial edits, that is, edits which make a post substantively better in a few different ways.

http://blog.stackoverflow.com/2009/04/in-defense-of-editing/