Well, it works if you don't count the fact that once you start showing it works every fascist/authoritarian government around the world conspires to expunge you so their people don't start to see what is going on.
If you've already seen this great. If not, it is well worth watching as there is a ton of great information in it.
The next time someone claims it has never worked tell them they are mistaken and direct them to these videos. It has worked... until authoritarians of all stripes banded together to stamp it out.
Anywise, if you have the time this is a pretty interesting history of anarchism. I had no idea just how wide spread the ideas of anarchy actually were at one time.