Hmm, I somewhat thought you were, because the term "Utopia" is usually used sarcastically when applied to Libertarianism, and often mentioned with Somalia.

As for Detroit, as long as gangs don't fill the void, it could certainly be a great example of spontaneous order arising.

There's a world of difference between libertarianism and anarchism. Part of the reason why I'm a libertarian is that I think it's really important for government to stay focused on the things it is actually important for it to do, such as public safety and fire protection (among other things), because when it gets too big and too bloated and eventually collapses, the whole thing comes down, not just the big and bloated parts.

Too many people, especially in comfortable first-world countries, have political ideologies that don't account for the fact that governments can fail and/or collapse, in whole or in part. When you rush to centralize every service you can on that foundation, you are putting a lot of eggs in one basket, and it's not a magical invincible basket... it's just a basket.