Can a user be banned on their host instance for breaking the host's rules on other instances?

https://lemmy.ml/post/1180947

Can a user be banned on their host instance for breaking the host's rules on other instances? - Lemmy

If I go onto a different NSFW server with this user and post a 4K image of my phatt micropenis, could this user be banned on lemmy.ml [http://lemmy.ml] for breaking the ‘no porn’ rule?

How Phatt are we talking about here?
Diameter > length

Hell yeah.

What ration we talking about here?

Anything less than 2-1 would be an exaggeration.