One idiot in the bunch asked Zuckerberg about having founded Facebook as a hot or not site. They had no idea what they were talking about.
Another politician just used the Q&A platform as an excuse to threaten Facebook with being broken up, while adding very little substance to the discussion.
Another was seemingly out of control emotionally, waving his hands angrily and belting hysterics, while pretending Facebook was going to bring on the end of Democracy and that Zuckerberg might be an evil villain.
Another tried to pretend that somehow Facebook needed regulation to stop bullying: as though bullying doesn't occur every day in every school in the world. It's like saying: we must regulate human behavior to end all crime! Good luck with that. They all seemed to not understand that Facebook = everything that you see everywhere else in life, from the public square to school to home. You can't actually regulate an end to bullying, no matter how sad that is.
After how much I've seen others talk up the wise politicians of Europe, I expected a lot more. They were no better than the US Congress. Which makes sense, given the condition of most of the EU and its politics.