As soon as we got the report, the account was blacklisted, but we can't blacklist what we don't know. Which is why it's so important that bad actors are being blacklisted as soon as possible.

However, this only works with services like Smartsteem (& buildawhale for example), that are actually blacklisting bad actors. For the rest, downvotes are needed. Because the accounts that are buying votes on their shit content and are receiving downvotes thus losing money, will learn from it; and the bid-bots that are voting on it, will realize that they're losing money by upvoting shit.