Here is an interesting Law for Blog Comments as described at gr.yet.anotherblog.net. Since the law is expressed in Greek, I will try to translate:
As the number of comments N to a (blog) post increases, the possibility that the subset of comments C (where C are all comments that refer to the fact that the number N increases) is not null tends to be 1. It should be noted that the density of the probability function is localy higher before and after "phycological limits" such as 50, 100, 200 comments, etc.
Amazing.. So true!
Please refer to this law as "The Lazopolis Law for Comments" (that's how he calls it, I guess it is fair to respect it.)