A boycott is not the same as ostracism; nobody said anything about kicking people out of society.

Why is Somalia suffering through what it's going through when self-organizing communes are so much better?

Somalia is not some country who had an anarchist society; it's a country which had a state and a government, and where a civil war broke out, eliminating all possibility of a stable society regardless of its political system.

Judging anarchism by the state of Somalia makes even less sense than judging non-anarchist societies by the actions of the Third Reich.