(1) Every one is liable to imprisonment for a term not exceeding 7 years if, without lawful justification or reasonable excuse, and intending to achieve the effect stated in subsection (2), he or she—
(4) To avoid doubt, the fact that a person engages in any protest, advocacy, or dissent, or engages in any strike, lockout, or other industrial action, is not, by itself, a sufficient basis for inferring that a person has committed an offence against subsection (1).