Interesting, 50% believe it can never work, ever? Have they heard of areas of Spain during Spanish civil war, 1936-39? If it weren't for initially communists, and then hitler, things probably would have kept working.
http://en.wikipedia.org/wiki/Anarchism_in_Spain
Anarchism isn't something as simple as 'no law', legitimate law can in fact exist. If someone like Noam Chomsky is an anarchist then you gotta know there's something going on there. Anarchism doesn't and won't ever exist in the cheap punk version of it, but it definitely could work in other, more thought out forms, where it takes the form of the examination of power structures, and democratically it is decided if this is legitimate or not. So parents, teachers are obviously legitimate, whereas police could be decided as legitimate, or not. Obviously justice would be important and murder and theft should be punishable things. But what about people in 'management decisions' and the wealthy, or land owners. Is that legitimate power in a purely democratic society? Yikes, doubt it.
So basically, anarchism is more than what most think it is.