The Hivemind Corollary
"Nonconformists travel as a rule in bunches. You rarely find a nonconformist who goes it alone. And woe to him inside a nonconformist clique who does not conform with nonconformity."
Examples of highly conformist nonconformist cliques include the emo and goth set, the feminist community and a variety of political movements (i.e., neo-conservativism, liberalism, Libertarianism, et cetera), along with pretty much everything else.