I mean, sometimes content is intentional. Look at the [revision history][1] on this:

https://serverfault.com/questions/443134/centos-6-3-install-reiserfs-support/443137#443137

The question was from 2012. The content within was deliberate, and this was the accepted answer. 

What motivation would someone have to edit 4 years after the fact, have the content *rolled-back* by the author, then make the same edit again?!?

It's disrespectful.


  [1]: https://serverfault.com/posts/443137/revisions