Does Piebalgs actually read the comments?
Perhaps he delegates the entire blog to some junior staffer. It would appear that he is a web poseur. If so this might be an opportunity. As the Dutch said while fighting the Spanish: "It is not necessary to have hope in order to persevere."
Has the "moderation" which your post awaited been provided? Was it displayed on his site? As the Dutch said while fighting the Spanish: "It is not necessary to have hope in order to persevere."