Capital simply ignores much of that legislation which might aid labor, while the parts that limit labor are rigorously enforced. Health care, welfare benefits, education, disability and retirement benefits, etc. etc. are clearly legislation that can properly be the goal of working class struggle within the capitalist state. But some of the other legislative issues listed clearly are debatable, and their existence makes hard and fast rules impossible. Nevertheless, with rare exceptions, I think we should oppose, and certainly not support, any state activity which places individuals in the power of the criminal justice system. Cops are scabs.
Prison guards are scabs.
Johnny Cash's song on San Quentin makes pretty good political principle. Incidentally, neither the working class as a whole nor any of its fractions now possesses the degree of solidarity and political sophistication that allow would transform some forms of activity from individualist terrorism or vigilantism to acceptable extra-legal or illegal political activity. Dual power, of course, can exist in other than territorial forms.