[Redcloak]

Your understanding of libertarianism is obviously limited to knowing how to spell "libertarian". (Which, on a positive note, puts you far ahead of many conservatives!)

Part of the libertarian "social contract" is that one may not infringe upon the rights or property of others. Your billboard would adversely affect property rights and thus get the owner sued for damaging those values. See? A tidy solution without the need for a State mandated, tax-payer supported "Committee to Promote Virtue and Prevent Vice". (There's a place where they have such a committee, by the way. You'd probably like the TV fare too, once you learned the language.)

[HumanaeVitae]

Really. Well, I suppose that would mean that painting your house pink could get you sued as well, right?