First Law of Cyber-dynamics: any unmoderated comment thread will reduce the total amount of knowledge and understanding in the world in proportion to its length.
Second Law of Cyber-dynamics: any unmoderated comment thread on a post touching on politics, race or gender will degenerate into vile idiocy within the first ten comments.
Third Law of Cyber-dynamics: no off-hand comment is too trivial to not generate thousands of words of cyber-commentary.
Fourth Law of Cyber-dynamics: no off-hand comment is too benign to fail to generate offense somewhere else in cyberspace.
Fifth Law of Cyber-dynamics: any comment thread on a blog with an ideological identity will give expression to the most extreme version of that identity within the first ten comments. (The Law of Cyber-Group Polarizaton--Brit will be shedding some light on this next week).