It's because someone sent an email to Nintendo, and Nintendo responded saying
"Hello,
Thank you for your email. While we haven't tested any of the hacked items, it is very possible that they could cause problems with your saved data, so we do not suggest that you obtain any of them.
We appreciate your providing the website, I will forward it to the appropriate departments for review.
Sincerely,
Sharon Matheny
Nintendo of America Inc."
Oh and by the way, the website they provided was not aibohack, it was just some random website that had pictures of the hacked items.