I'm on 11.4 Luma/boot9strap. I keep my 3DS connected to the wifi. I have streetpass and spotpass on. I did go online on a leaked copy of Fire Emblem to enable spotpass on it. I did download the free DLC for it. So far no ban.
So I went to the grocery store to do some light shopping and I thought to myself "What about Moleskin?". I found some Dr Scholl's Moleskin that's soft. I'll try it.
I don't have any t shirts lying around I can cut up. Hmmm. What about this? https://www.amazon.com/Professional-Premium-Grade-Gaffer-Power/dp/B00GZE3UJ8