Reading Slaney's link it appears your gendarme was wrong.First it appears to be a civil matter (following Article 9 of the Civil Code) not a criminal code matter, and furthermore, he has no right to demand the picture be expunged. Second , it is not sufficient to show that the image was taken without your consent; you have to show real damage or hurt. Third, it's a question of image right over news right; the defendant can plead that the 'news' value,including such matters as social record, is of more value to the public than the subject's rights in the image. Fourth, it appears that the subject's case is enhanced if they have been photographed in embarrassing, degrading or humiliating circumstances e.g a topless duchess in a French garden. It's arguable that this plea is not as readily available to those who have voluntarily put themselves in that position; why should a wrongdoer or drunk have a better case than somebody normal and sober?