That is how change happens in the world, not by trying to ruin the lives of individuals emblematic of a flawed system but quite likely perfectly decent people in and of themselves.
You should not conflate the two.
Creating negative consequences for poor choices in society is a great and effective tool that should be used more often.
I don’t think “vigilante” or “angry internet mob” are accurate descriptions, either.
You don’t need to be angry, or a vigilante, or seeking “justice” to wish negative consequences for certain (legal) choices made by others in society, such as working for the RIAA or other such jobs that make our world and society worse.
It’s a false dichotomy to think the only two options are “do nothing to hinder them” or “angry internet mob”.
Legal, harmless ways of discouraging certain choices are perhaps one of the best tools available to us for improving our society, in many different contexts.