Still, Your allowed to run homebrew.
But CobraODE is not a custom firmware....Its only a Hardware to run ISOs
Both be happy, it is custom firmware on a hardware emulator, plus whatever u bake on the isos. On a sidenote, it does exploit a vulnerability so code injected by cobra is not 100% stealth.
Related to OP (Btw if real AceProne, yh he is known enough on NGU), im sci kind so i suggest bringing in tests and mines dont match. forced a new account sony ban by wrong npdrm on psn home, but mac is not being blacklisted (even it could anytime). Laughing about the chances of having someone else somewhere spoofing its mac with yours, mac id range isnt as big as cid or psid after all.