I saw noise.cash post on twitter shared by acidiyo. I think spamming is everywhere, every corner of the internet. Let's take youtube, you see tonnes of spam comments from bots as soon as the video dropped. Even in so many other websites get spam comments, these people want back links for their website.
You mentioned about quotes " hive has micro blogging dapps and communities " like dbuzz, people do share quotes, photos with single sentence" community motto it self means to be buzzing in some sentences.
You mentioned some countries in this post, I kinda agree but it looks bit targeted by saying you can identity em with their names simply. I'm from India, I don't simply drop like "great post", I love to engage in posts.
I saw people from other countries spamming too, so let's not talk about there nationalities. It's just my opinion.