Across many subreddits, the announcements to participate in the blackout were highly upvoted (>90%), while announcements against participation were heavily downvoted.
Examples:
https://www.reddit.com/r/AskHistorians/comments/146xzgk/meta...
https://www.reddit.com/r/Games/comments/145s613/rgames_and_t...
There were a lot of people protesting the protest in r/modCoord but they started banning them
r/modCoord has negative comments minutes to days old. Criticism is not banned evidently. How did the banned protest the protest? Are the protesting moderators allowed any moderation of their coordination channels in your mind?
No idea it is their channel
The issue is, they should not be allowed to coordinate site-wide. The whole point of subreddits is to have separate competing communities, not to coordinate.