I mean, look— I don’t like holier-than-thou activists either, but you need to make a distinction between them, actual activists, and the groups they’re representing. The former is an extreme minority.
Instead of being distrustful of the movement and making yourself look like an ass by preemptively attacking, your energy is better spent not bothering. In the event you encounter a nutjob, go troll them or tell them to pound sand. I promise you, as long as you aren’t on (formerly Twitter) or Tumblr circa 2016, it’s not as common as you think.