It would be beneficial to have something similar to the Role Limitation feature except for content authors or commenters. This will act in a similar way to the Role Limitations. An administrator will be able to protect accounts that have either authored content or commented on content from being purged.
A new fieldset is added alongside the Role Limitation fieldset. This fieldset has two checkboxes.
When the database is queried for inactive users to purge, conditional query statements are added if the admin has selected to protect authors or commenters.
I've included my feature request as a patch against the 4.x-dev branch for the maintainers to review.
Active
4.0
Code
Thank you for your work on this module and thank you for working in my merge request!