Quite possibly. In that topic, the employee said:
Plex does parse IMDB/TVDB/TMDB for poster art and metadata, they then curate what they find and automate collection of the data to their own metadata service, watch.plex.tv. If this site has takedown requests sent over a copyrighted image (such as a movie poster) they cannot serve our servers with the posters. You can manually get the poster image yourself and upload it though.
