ebw on 07 August 2013
Are you sure that was the exact message? If so, then this was a bug, because Miiverse only allows 200 characters and your message was 205. Possibly there was nothing offensive but it somehow gave you that error message instead of the correct one. There is no way for the "tone police" to cause an instantaneous error.
EDIT: Unless the post you were replying to got yanked while you were typing, perhaps.
