Retaining high value threads from automation deletions

Hi,Just wondering if others have a better way of retaining high value content that we wish to retain. Our automation's run with pre-deletes, they are reviewed by our SEO team who identify any high value content we wish to retain. 

In order for the high value content to be excluded from the deletion automation we reply to the post with a full stop, so effectively re-setting the clock.

It's the least intrusive way of doing this without altering the automations. Do others have a similar issue or solution?