Yes.. That's our problem on Hive.. Once I wrote this article about the problem.. https://hive.blog/hive-114929/@puncakbukit/two-weaknesses-of-hive-blockchain
There is even a victim who took revenge like here.. https://hive.blog/hive-148441/@puncakbukit/time-to-evaluate-downvote-mechanism-hive-the-blockchain-of-cold-hearts-and-egomaniacs-hive-die-blockchain-der-kalten-herzen-und