This type of behavior has never produced better living conditions any time in history that I can think of.
What are you on about? It's the reason why we live in the conditions that we do.
People used to literally kidnap and kill CEO's, that's how we got workers rights, marginalised/discriminated groups have had to continuously protest and riot to bring attention to their causes and get changes either systemic or social enacted or discussed.
No, we have these rights because people exercised collective power in an organized and strategic manner. Including, yes, disruptive acts of protest which if you had asked instead of trying to shift the goal posts to, you would find that I support.
The isolated cases of lone wolf killings were not frequent enough to have any real effect but what effect it did have was to cause fear and division among the people we need to organize, and to give rhetorical weapons to the powers that be.