The main problem with ancap is that there's nothing preventing a violent gang (a new government if you will) from forming, because everyone else is being so peaceful, and if everyone else stops being peaceful, then it it isn't ancap any more - its just regular anarchy.
Ancap will only work if there is some force to stop people from conducting acts of violence, preferably some force that isn't corruptible. So, until we have open-source peacemaking enforcement droids no such utopia can exist.
Seriously? If you are going to comment about what will and won't work with some idea/concept then at least take the time to read-up on the subject. This has been refuted repeatedly in ancap theory/philosophy. You obviously don't understand ancap.