A lot of people might not be aware of this, but in today's (12 Feb 2021) singing livestream, Holostars' Kanade Izuru received a really big amount of spam and rude messages, such as he, being overwhelmed, and fearing to make a bad impression on first time viewers, decided to Delete the archive and stop displaying the chat on stream. The spam comments were mainly from international fans, since they were clearly either one liners or badly machine translated rude questions.
This is but the tip of the iceberg that is the unruliness of a lot of intl fans- both holostars members (the same Izuru just banned heart messages on his chat because of the endless spam a couple of weeks ago, and Miyabi receives a lot of rude english comments), nijisanji members (notably ibrahim, who dedicated one whole livestream to just his viewers' behaviour, and Nagao Kei) and even independent streamers are under the constant stress of having viewers that dont follow their rules and ignore the actions that they take against spammers and such (maybe even just because of ignorance of the language, or of the stream rules.). Furthermore, I only know male vtubers' experience- i cant even imagine what the girls that are popular in the international audience have to deal with.
As this wiki is one of the first sites a newcomer to the vtuber community might visit, I think that it would be beneficial to all to have a quick stream rules infographic on the home page, and a "stream rules" section for the streamers' pages, like the one that user Nxmiya added in this page.
Im sorry for the weird english- I am still a bit heated from Izuru's livestream haha.