Libertarian pessimism, optimism, politics, and?

A pessimistic libertarian believes that society cannot avoid some degree of coercion, but seeks to minimize coercion within some reasonable constraints. An optimistic libertarian seeks to abolish coercion, to base society entirely on cooperation. A political libertarian thinks that one can participate in the political system (vote, etc.) without participating in coercion or legitimizing the system. (If your participation does nothing to change the outcome, are you actually participating?) What should we call the opposite sort of libertarian? Voluntaryists oppose political participation, but have some additional beliefs. Are there any anti-political pessimistic libertarians?