An updated version of my reply to Mike Huben’s Non-Libertarian FAQ contains the following additional rebuttal points:

• What about bad governments like Cuba?
• Love it, or Leave it. A charming way to run society.
• We can’t emigrate because there is no libertarian nation.
• Tragedy of the Commons
• The state is like the Mafia
• Governments have “powers”, not “rights.” Rights are reserved for people.
• Why does the State tell me what to do with my property?
• Your property doesn’t belong to you, it belongs to the government
• Additional regulations: a violation of property rights?
• Without taxes, we would be wealthier

There’s more to follow, eventually. The arguments are starting to get pretty thin, however.