A lock for a few days isn't the end of the world. As far as I know, you don't lose your position or anything as a result. Far harsher punishments for far less have been given before the Magistrate system came to be.
This is correct.
You agree to play by the IRs when you created your account. They aren't really negotiable.
As for their interpretation, we go with what was historically done, as I think most of us, if not all, have been playing enough years to see quite a few violations, both up close and afar.
As for the length, well... the message was a very clear-cut violation. If you look up other cases, where doubt was present, they have dragged on far longer, too long according to many.
