Nonsense. They have either star lock washers which "bite" or in the case of more modern cars, the wire eyelet itself is a form of a star washer. The threads of the bolt don't do anything.
Not only that but the original cars we speak of on here, the 60's and 70's DID and DO have grounding problems because of the methods used. The only reason "they got by" so well is the lack, in most cases, of any or much electronics
If you are worried about rust, use paint or de--ox
