We can assume, based on my case here, that "going online" extends to having Wi-Fi enabled on your 3DS while having Pokemon Sun or Pokemon Moon installed (not the pre-load, the CIA rip of the cart leaks)
@Majickhat55
Then I do not understand how I became banned.
I used the same CIAs that everyone else used. I never connected to any of Pokemon Sun or Pokemon Moon's online features. It's been confirmed countless times that accessing the Friend Plaza doesn't connect to the internet, but instead does local wireless.
Nintendo's vague quote stated that any system that connected to Nintendo's servers that had the software installed flagged their systems for the ban. When your 3DS first connects to the internet, much like the WiiU, it checks your 3DS's firmware to see if it's the latest one. Nintendo could have put in a check to see if you have an unlocked Pokemon Sun or Pokemon Moon game. They could have had it check your play history app. Who knows what they did. Safest bet is to avoid having your 3DS connected to Wi-Fi until the 18th. Delete Pokemon Sun and Pokemon Moon and re-download it when the so called "version: 0" fix dump is out. Delete your save data.
The best thing you could do; if you have a NAND Backup before you installed Sun and Moon, delete the games and their ticket, then perform the NAND Backup, then just re-download the PROPER dumps of the games when they come out.