Has anyone done this?
I periodically ate pork rinds and used them for things when I did Atkins -- but my DH can't stand them, so I never added them to meatballs. They up the fat, and depending on what kind of meat you use, it can have a bit of fat.
You might want to use MFP and put the recipes in with a few variations and decide what works best. For me, I haven't made meatballs -- I've made meatloaf. I still put in some breadcrumbs - -not many, and I use panko. I use a beef/bison mixture. For meatballs, I'd use grated peccorino reggiano -- I've only had meatballs from restaurants since surgery, and overall, they have too many calories for the amount of protein, so I don't have them often! But they add some variety!
Of course my view would be, Why ruin a perfectly good pork rind by putting it in a meatball! LOL! I do love BBQ pork rinds!
Dana Carpender's Low-Carb cookbooks use pork rinds. I've seen them used as a "breading" before. I haven't tried them yet. Sounds like it will work. How bout a little Parmesan and a little original pork rinds ground up? yum.