"We definitely hear and understand your concerns and really appreciate all the thoughtful feedback we've received over the last 24 hours," writes CEO Keith Valory on the website. "We've been working on this for weeks and many of us who use Plex every day have had to work through this carefully to get ourselves comfortable. That said, many of you have raised good points that (somehow!) we didn't consider, so we are going to make some important changes to address those."
Further, while Valory thinks it would be tough to identify any media file based on the information Plex must have to properly function, his company is going to do three things to help assure his users. First, the playback stats will be "generalized" so that they are less specific; e.g. rounding out playback durations to further obscure the specific file, yet still use the information to manage its servers. Second, Plex will now allow users to opt out of sharing this type of data. Finally, Plex will let you see what data is being collected and how to opt out of it.