When you said you asked for shipping to stop, it would usually be taken to mean you asked for a user to stop commenting or posting about the "ship."
If asking doesn't work, there's nothing more you can do,
which is why we say,
Laugh about it.
Unfortunately, it was in the form of troll alt-follows.
As a mod, you have a responsibility to disapprove posts calling attention to troll alts.
It doesn't matter what the alts are called, so that's completely irrelevant.