[0xBA5ED]

If the relations between free individuals is unmediated, they can interact in any way they choose. So if a group agrees to pool their resources and impose their collective will on others, then you just lost your anarchy. To eliminate "coercive forces", you'd need to ensure that no group or individual can acquire leverage over another.

[kiliantics]

A big part of anarchist ideology is the notion of "solidarity". So if a group were to attempt to assert authority by coercive means like this, then people would ideally come together in solidarity to stop them. This is why anarchists and antifa show up to stop neo-nazis that are threatening minorities and other vulnerable groups.

[0xBA5ED]

What you're describing is mob justice, which is essentially pure democracy.