1. Godwin’s Law
The most famous of all the internet laws, formed by Mike Godwin in 1990. As originally stated, it said: "As a Usenet discussion grows longer, the probability of a comparison involving Nazis or Hitler approaches 1." It has now been expanded to include all web discussions.
It is closely related to the logical fallacy “reductio ad Hitlerum”, which says “Hitler (or the Nazis) liked X, so X is bad”, frequently used to denigrate vegetarians and atheists.
Common Godwin's Law appearances include describing women's rights campaigners as “feminazis”, comparing the former US President George W Bush to Hitler, or saying Barack Obama's proposed healthcare reforms are the new Holocaust.
In its broader sense it can be used to describe any situation where a poster loses all sense of proportion, for example describing New Labour as “Zanu-Labour” after Robert Mugabe’s Zimbabwean political party Zanu-PF.
As well as the descriptive form, it can be used prescriptively: so if any poster does mention the Nazis in a discussion thread, Godwin’s Law can be invoked, they instantly lose the argument and the thread can be ended.
If this is done deliberately to end the argument, however, it does not apply. This codicil is known as “Quirk’s Exception”.
4. Skitt’s Law
Expressed as "any post correcting an error in another post will contain at least one error itself" or "the likelihood of an error in a post is directly proportional to the embarrassment it will cause the poster."
It is an online version of the proofreading truism Muphry’s Law, also known as Hartman's Law of Prescriptivist Retaliation: "any article or statement about correct grammar, punctuation, or spelling is bound to contain at least one eror".
"For too long, we linguistic pedants have cringed, watching this phrase used, misused, and abused, again, and again, and again. 'This begs the question...' [we hear], and we must brace ourselves as the ignoramii of modern society literally ask a question after the phrase."
While Mr Ordoveza’s point is entirely valid (“begging the question” is a logical fallacy, meaning to "beggar the question", or assume your conclusion in your premise – not to raise the question), the plural of ignoramus is ignoramuses.
It was apparently first stated by G Bryan Lord, referring to a user named Skitt, on Usenet in 1998.
read other rules here: source
[And you thoght when I cited argumentum ad nazium here that it was diddly-squat ]