Homebrew Removed NNID?

[Negatronic]

Ok, this sounds like a stupid question, and it probably is. I have GM9 and Luma 9.1 and over 100 CIAs installed on my N3DSXL. My NNID is still attached to this 3ds. Is that risky? Should I be trying to remove my NNID? I have been scouring GBATEMP and reddit all afternoon trying to figure this out.

My best idea right now is to remove my SD card and do a system transfer, but then skip the part about loading it onto another system.
I have also seen a few people talking about doing a NAND backup/restore. That seems extreme. Last time I restored a NAND it didn't go real well. It works, but I have not been able to install any game CIAs on that system.
OOORR, do I just format system memory in the system settings? Would I still have CFW after that? Would my games work once putting the SD back in?

I am going to be putting CFW on a 3ds for a friend of mine and he has tons of money invested in the eshop and is worried about getting his account banned.
What advice should I give him for safely using the eshop?

Aaaand finally bonus question. Is there a way, or even a need to backup saves from eshop games before installing CFW. I know how to use checkpoint and JKSM, but you can't really use them before CFW is installed.

 

[AmandaRose]

Why do you want to remove the nnid your 3ds will only be banned if you cheat online or play a game online before the date it officially is brought out.

 

[Negatronic]

But what if nintendo puts out a patch next week? My friend who has hundreds of dollars invested in the eshop and no knowledge of CFW might get banned? It's really peace of mind / insurance policy for future patches. Or do you think we're just being paranoid?

 

[chandlercomicman]

Don't worry. You don't need to remove your nnid. Just don't play Smash online with mods installed, okay?

 

[smileyhead]

Yes, you are being paranoid. Nintendo can't tell if an installed game is from the eShop or not. The only way you can get banned is by cheating in games online. You have nothing to worry about.