Recent developments in the 3DS scene allowed for something every 3DS flashcart user has dreamed of since these devices entered the market - online play. We also learned a little bit more about the information stored in ROM's, namely about the Unique Cartridge ID's. This is a Public Service Announcement specifically about them.
Unique ID's are only as unique as you let them be. Users quickly figured out a method of injecting pre-existing Unique ID's from their Gateway dumps (*.3DZ) into standard scene dumps (*.3DS). As handy as this is for your average user, this procedure has risen some concerns about possible future bans Nintendo might resort to when notified that the same ID's are used by numerous games and numerous users.
GBATemp.net's stance on the matter is relatively lenient - you are free to share your Unique ID's with other users, however by doing so, you accept any penalties resulting from such trading as your own fault. If you post your "Unique ID" online or start sharing it with your friends, it immediately stops being "unique". If Nintendo resorts to banning games, systems or NNID accounts from using their online services and you happen to be affected by it, you are the sole responsible party in such an event.
As such, we do not recommend sharing your Unique ID's publicly - keep them to yourself and keep them "unique". This website or its users will not to be held liable regardless of what the results of trading ID's may be in the future. You have been forewarned.
Thank you for your attention and if you play online with backups, play it safe!
Best Regards,
The GBATemp.net Staff