RealNevermore:
Pardon my French
But some moron/s got no life and made new accounts yesterday to review bomb Pluto with 1.0/10
Look at these -
https://mydramalist.com/profile/nayannadepaula/reviews
https://mydramalist.com/profile/13628002/reviews
https://mydramalist.com/profile/13628034
Report the reviews as spam if you can/want. I did.
It could well be a coincidence, even if it feels targeted. Maybe they were so incensed by Pluto that they decided to make MDL accounts after it completed. I think 3 reviews isn't enough to make a definitive conclusion of "review bombing", and 3 bad ratings out of 1422 isn't much in the grand scheme of things. It doesn't seem too unlikely to me that many people would be unhappy with Pluto because while I love Snap 25, I have found the few recent GMMTV series I've seen have fallen off at the end for me.
Besides, if reporting reviews you dislike/disagree with as spam got every review on this site taken down, people simply wouldn't review because of the censorship. I certainly think everyone has their rights to like and dislike the direction of a story, and to review as harshly or gently as they wish, without being insulted for it.
(Also, the final reviewer you linked actually gives decent scores for some categories, so maybe only the first two accounts are linked, if you really insist there's rating manipulation.)