Everything is "legal" allowable if there are no laws.

If you work hard and save up and die you think anarchits should steal your wealth away from your family?

You don't want to have anything? People don't just steal money.

You assume people would still band together and work together. I agree and that generally takes leaders to accomplish. Leaders typically do not do things for free so you would still have a quasi government.
I think you have a more positive view of humans. I think humans were generally so awesome and cared about you they would already be banding together to reduce government. It's easier to vote for smaller government than to act as a policeman.