Ok, this is from 1 month ago, but just in case I will leave this anyways:
Nintendo doesn't consider that they are banning a console, they consider that they are banning the access of a user to online services
They could ban your IP, your user, they can ban just anything related to you, so they can change their mind and ban that console anyways and you can't do anything
More details here (This are also the only reasons of why the would ban you except for illegal purchases on the eShop which isn't here but yes on the support page):
https://www.nintendo.com/nintendoaccount/code-of-conduct