True, Reagan did say those things, but that doesn't excuse anyone who believes that libertarianism itself is equal to anarchism. That's just propaganda.
"Anarchism is the social ideology that refuses to accept an authoritarian ruling government. It holds that individuals should organize themselves in any way they wish in order to fulfill their needs and ideals. In this sense anarchism is not to be identified with nihilism but can be seen to have similarities with political libertarianism...."