How about movies?
Option 1: bulk download of French language movie subtitles. I haven't tried it, but OpenSubtitles.org has both instructions for programming and non-programming.
Option 2: Download plot synopses from the plaintext IMDB database (with reviews) - mirror links. Useful files are 'language.list', 'biographies.list', 'plot.list', etc. Unfortunately I don't see reviews and I checked and only some of the plot summaries for French movies are in French.
There are also some unofficial IMDB API's that may include reviews. You can check them out herehere and here and here.