As a modern variant to Godwin’s Law (“As a Usenet discussion grows longer, the probability of a comparison involving Nazis or Hitler approaches one.”), I would submit the following:

“As blog comments grow longer, the probability of someone being called a “spammer” approaches one.”

Does this mean that spammers are the new Nazi’s? Will we see spammers looking the other way while bloggers storm the prison camps to free newbies?