You can to an extent, but that's a losing venture. If pubic opinion goes against this tech hard enough, it'll keep some people from working in those industries. BUT if those products are profitable enough, they will simply pay more and that'll be moot.
Attacking the people who are earning a living isn't the answer. Most people take the job with the best combo of pay and work/life balance they can find in their area, or if they can afford to move. Not that many have the luxury to pick and choose based on their morality. And if compensation is high enough, it's a lot less likely.
It's far easier to try to prevent this tech from being used at all. I know political action is hard as hell but it's a lot easier than trying to ostracize an entire industry's worth of workers. It may feel easier to denigrate faceless individuals but that won't accomplish anything. Plenty of people work for weapons manufacturers and such.