What anarcho-socialism really is

Any act which either disposes of property or negates its disposition is an implicit property rights claim because a person is asserting the right to exercise exclusivity over it. This is the basis of ownership.

Socialists cling to this conceit of collective ownership or ownership by nobody for a simple reason. Ownership is a necessary requisite for theft. That is to say that theft cannot occur without a previous claim of ownership by another. By removing the element of ownership, socialists believe they can appropriate and consume what others produce without committing theft.

In other words: what they really are, is wannabe robbers looking to rationalize their desires. By the way, I found this explanation here.