I saw your question on Reddit yesterday already and I can tell you. Your friend will be good. There is alot a lot of people out there using loot macros for years and they havent haven't had any ban. If your friend wants to change account and everything that is fine and there will be 0 chance that he will get banned after. It sounds more like he is paranoid now that he used a cheat and it will haunt him for longer time.