Nintendo has suspended Swapnote. In a terse announcement on the news page, Nintendo informed users that the 3DS Swapnote feature was turned off yesterday at 7PM Pacific time, due to inappropriate use.
Nintendo has learned that some consumers, including minors, have been exchanging their friend codes on Internet bulletin boards and then using Swapnote (known as Nintendo Letter Box in other regions) to exchange offensive material. Nintendo has been investigating ways of preventing this and determined it is best to stop the SpotPass feature of Swapnote because it allows direct exchange of photos and was actively misused.
Nintendo added the ability to trade photos to Swapnote in April. Sadly, conducting a Google search for Swapnote results in a distressing number of inappropriate images of Nikki, the application’s animated guide.