I can't find it but I remember one person had a video that went over the Eiffel Tower illustration incident at a convention thanks to the Spotpass feature and that was the reason it was discontinued. There were clearly other cases where predators could share, but it was an example of an unintentional message being shared. Used Nintendo 3DSes could be p bad as well. A saved file being on a used cartridge game is one thing. The systems have cameras and SD cards for storing media that apparently went unchecked as there was at least one example where a parent found adult content on a system.