:Wrong Thing: n. A design, action, or decision that is clearly
incorrect or inappropriate. Often capitalized; always emphasized
in speech as if capitalized. The opposite of the {Right Thing};
more generally, anything that is not the Right Thing. In cases
where `the good is the enemy of the best', the merely good ---
although good --- is nevertheless the Wrong Thing. "In C, the
default is for module-level declarations to be visible everywhere,
rather than just within the module. This is clearly the Wrong
Thing."
-- The AI Hackers Dictionary