Large amount of 7 and 8 out of ten ratings coming from Colombia

Extremely weird trend of 7 and 8 out of ten ratings from a specific country which I'm guessing is done by bots located in that country. They're going after high rated romance anime episodes for some reason. The trend is pretty consistent across all of the episodes and the amounts of 7 and 8 ratings are almost equal across the review bombed episodes so this is pretty strange.https://www.imdb.com/title/tt1371772/ratings/https://www.imdb.com/title/tt4792756/ratings/

https://m.imdb.com/title/tt8142470/ratings/https://m.imdb.com/title/tt21034246/ratings/