There oughta be a law!

Hanlon's [or possibly Heinlein's] razor: Never attribute to malice that which can be adequately explained by stupidity.

Callahan's principle, illustrated here on a handsome stein: You can't argue with stupid.

Segal's law: A man with a watch knows what time it is. A man with two watches is never sure.

Hofstadter's law, which recursively contains its own addendum: It always takes longer than you expect, even when you take into account Hofstadter's Law.

Murphy's law [or sod's law]*: Anything that can go wrong will go wrong.

Sturgeon's law: Nothing is always absolutely so.

Sturgeon's revelation**: Ninety percent of everything is crud.

*I'm assuming this link is pre-borked, or will go dead, or will crash your browser, or something because, well, y'know.

**Please notice how rigorously we at macbebekin implement Sturgeon's revelation, in homage to a fine author and a visionary.