From the sound of it, some English-speaking Splatoon players are either afraid of or annoyed with their Japanese counterparts. A few even hate playing against them.
The reason for this is not only due to the Japanese players's Splatoon skills and high rankings, but apparently, the adventageous lag they cause.
This has led to some rather dodgy English language tweets that might be jokes or nothing of the sort. They are being translated in Japanese and circulating online. (So, jokes or not, it might be a good idea to think about how your tweets can be construed!)
Dear Japanese company, please remove Japanese players from your game.
Not all the tweets have been negative or nasty!