I'd start hitting there assets, not people deff don't need to do anything like that yet, or frankly ever if you do things right. Vandalism is way easier to get away with and often bloodless if your doing it right. And it hurts billionaire more then if you just luigi'ed some of them. Because they're still alive to feel the pain of loss :D
Look up what the IRA was doing to Britain after they realize killing brit soldiers just meant they'd send more brit soldiers. Soo as they started bombing key officials investments, they're tune changed real quick.
I'm not saying you have to go uni-bomber on them either. Even minor vandalism will still affect them.
(this note out of all of them is the most likely to get me smited but Fuck it, I want you to know what the actual next step is if you ever want to escalate)