Anarchists assume that everyone is good.
False; voluntaryists make no such assumption. Voluntaryists believe that no matter how good or bad mankind is generally, anarchism would work better than compulsory government.
Anarchists contend that monopoly courts (and police) are not the answer. [HB]
Also see:
How Government Solved the Crime Problem
Rectification of Injustice, Chapter 10 of The Market for Liberty by Morris & Linda Tannehill (1970)