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if the leaders of the kbin,lemmy and all fediverse community here can't find bastard accounts, who deliberately downvoted posts (which contain truthful content) from user accounts, while you don't even mark them all and ban their accounts permanently. then I will quickly get out of this community. and one more if the people who have been blocked by the author of the post, but they can still read and downvote the account that has blocked them. then it means that the system in the application in your community is disabled, damaged and useless!!!
Why do you care about downvotes? This isn't reddit. As far as I know, downvotes don't hide your comments. (And votes wouldn't be useful to any of us if you could block them, would they?)
Let's find out. Downvoting your post, to see if it affects visibility.