The folks at Team BlackSheep put together a "Christmas Special" video with their quadcopter and GoPro camera. While there are few details about the group, the equipment used, or whether or not the French police are investigating, it's fun to watch as they land on a truck in traffic, hover close to the street with people taking pictures, and follow a French police car up until the point when they are apparently spotted.

Then, they make their hasty retreat. Check it out:

Here's a separate video of a cool homemade quadcopter with a GoPro attached: