Yes, I've been around "for a while" and know that there was typical outrage after the policy change. Plex clarified their intent and provided the opt out.
This is on their privacy page with a section to opt out:
All this fear mongering is based on what? the fear that the MPAA will sue plex users? It's in Plex's self interest to make sure it doesn't have identifiable data to put their customers at risk. Dunno if that makes you feel any better.As described above, client playback data does not identify what content was played, does not identify what server the content was played from, does not identify the owner of the server that the content was played from, and is generalized.
Similarly, the server playback does not identify what content was played, does not identify which client accessed the content, does not identify the user who played it, and is generalized.