This was discussed already in WarezNX and he may have possibly jumped to conclusions. For starters, this error code is possible to achieve without a banned account seen
here which wouldn't be a surprise since he has a kid. Also while no one asked him to login with his account on their website to check if its banned (currently the only way to check for banned accounts), then that means the account wasn't banned but the console. If that was the case, then Nintendo may have banned the console because it was associated with his previous account which was linked to a banned console. Lastly, I've never seen this error code pop up when trying to access the eShop but when users try to update their games as seen in the
banning thread. If it was 2124-4007, then we would know for sure it was the console that was banned but the error code is slightly different.