Uhh, this is wrong. The ban targets an identifying file on the 3ds called LocalFriendcodeSeed_B (or LFCS_B for short), which is console unique. Emunand is a clone of sysnand, and has the same LFCS_B file. Unless you change that file on your emunand manually, getting banned in emunand will result in sysnand also being banned. Emunand is NOT a ban shield.