You can do it like I did: make one post, copy-paste it when it's relevant, mute replies and never look at the thread again.

When every single time someone screams "China bad" there is at least one person protesting it, a more open-minded person starts to doubt the official narrative, even if only by a little bit. I basically got exposed to left-wing ideas for the first time from the few people who bothered responding to these idiots.

I'm not saying posting is praxis, but...