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If you comment spam then yes, you get flagged. And this account is operated by a bot. It’s not even a human.

Because this is a bot account, part of a group of similar bot accounts that are leaving thousands of SPAM comments on other people's posts.

No it’s not like twitter or YouTube! If you think that you don’t know what’s happening!
It’s because this account spams every post and is rightfully being downvoted