- Edited
Tomoyuki I feel you may be taking this too personally. Perhaps a report function would be okay if it simply escalated a case to a Webnovel employee to review if the deletion of a review by an author was justified or simply points inflation, whereby in the later case, the author (perhaps after several strikes) has their review deletion ability revoked.
Now before you make the case that there would be too many reports for any number of staff to handle, the reports could first go through some regex matching against a database of deleted reviews. If the ASCII content of the review (to exclude emoticons) does not repeat itself several times in a row, does not have a 90% match to some threshold (let's say 20) of deleted reviews by other authors, and does not contain pre-flagged hate speech (e.g. "kill urself"), then it would escalate to a staff member to determine.
To discourage false reporting, IP bans could be leveraged against the reviewers especially in the case of hate speech. Honestly, IP bans aren't harsh enough for those who engage in cyber bullying, but there's not much else that can be done that would be more severe. Perhaps make their coins cost more?