Thank you @lissyx, there were more spam posts than actual posts under Common Voice, now they are gone. BUT, I was away for an hour, and here is the view:
Exactly… I think I have some level of moderator rights here because I moderate Turkish sub-forum. I can edit spam posts, I deleted contents of some very inappropriate posts or posts with dangerous links in the past, but usually leave them as they are for the administrators to see the content. But I don’t know what happens after that. They create multiple accounts, post many junk across many projects/areas in 10 minutes and disappear.
I used to moderate/administer tens of different forums since 1990’s, there are many different methods to prevent these, up to disabling an IP range for a period of time - there should be some policies for it. But you have to invest the time to do it. Currently, even the discourse admins e-mail is not working (last month there was an error which possibly required a server restart, I could not reach anybody, I finally posted an issue on a related GitHub repo assuming somebody is maintaining it).
In CV, we had Language Representatives in the past, who are perfect candidates for such moderation I think. They passed a kind of recruitment procedure as volunteers.