How is it ever legal to break into a business's property and secretly video the operations? You surely can't sneak into a factory and record their processes to sell to China. Is it only allowed when it's being used for protesting, not for stealing IP? Or only on farms but not in factories? What about trespass law? Non-disclosure agreements for employees? Are those invalid?
Legality and the morality of the times may be different species, but speaking only on the latter, would you say the same thing about people who do undercover investigations in other areas (like sweat shops, child labor and many other things that most people would agree as unethical)? Shouldn't it be the law that should catch up?