Does it go to the mods of the community that the comment is in? Does it go to the admins of the instance that community is in? The admins of the instance I’m logged into? All of the above?
Does it go to the mods of the community that the comment is in? Does it go to the admins of the instance that community is in? The admins of the instance I’m logged into? All of the above?
This, unless this has changed.
So how can we report to the admin of our instance another "problematic instance?
send a message to the admin(s)
You can’t. You should reach out to the mods/admins on the other instance.
You can compare it with e-mail.
When you get an angry mail from company B while you work at company A, there’s not much somebody at company A can do about it, except blocking the mails from company B.
If it’s a very problematic instance the admins can choose to block federation between their instance and the other instance.
Admins will also see the reports, not only the community mods. In fact even admins from other instances will see them, which sometimes is a bit confusing.