Being automatically greeted is kinda disrespectful tbh. When I join and get autogreeted by someone I don't know it really bugs me, especially when it happens multiple times per connect.
I prefer to know that someone is willing to take a few seconds out of their time to say hi, isn't that kind of the point about greeting someone? Making the effort to show your respect?
The fact that it causes spam is a good reason to ban it. On the other hand, its causing one to get upset because someone greets you automatically and not in the way you want in a car game is nonsense and far-fetched lol.