"Disregard / do not include" specific subfolder(s)

I would like to see an option where I can have the scanner disregard certain subfolders within my media. My particular use case - I have a Photos folder, and within that, I have my Lightroom library. The Lightroom folder includes preview images that Lightroom creates, and Plex is now indexing those as well.

If there is not already one, could you add a “do not include” section of the Search Folders page? If it had to be a robots.txt-style separate file, that would work too.

https://support.plex.tv/hc/en-us/articles/201375253-Excluding-New-Content-with-plexignore

Early 2021 clean-up: implemented