"As an online discussion grows longer, the probability of a comparison involving Nazis or Hitler approaches one."
Here's a new law, in much the same vein,
"As an online discussion thread concerning Mitt Romney grows longer, the probability of an anti-Mormon bigot hijacking the thread approaches one."
Not that this has happened on my site, as our posters are of a little better pedigree, and we do not discuss Romney very much. It is just interesting that there is a subset of people with so much irrational hate that they would use any excuse to attack members of a particular faith.
Just an observation.