Earlier quoted context omitted.
It's funny you should rail against libertarians when discussing a city that's where it is at least in part because the productive people were driven away through extra taxes and regulation.
I am actually sympathetic to many aspects of libertarian thinking on matters of social and economic policy. I certainly was not railing against this worldview, though I apologies if you found negative connotations in my use of the word 'rabbithole'.
As for Detroit, as long as gangs don't fill the void, it could certainly be a great example of spontaneous order arising.