Just a privacy thing. Your vin is pretty public, it’s right there visible through your windshield.
But let’s say I walk out to a parking lot right now. If everyone posted their full VIN I could just google that VIN and a post with a person saying it’s their VIN would come up. So now I can tie a car to a name online. Through other social engineering etc you can maybe narrow down who the person is and where they live etc.
I mean, it’s not the end of the world since with today’s internet all you need to do is google someone’s name and you have access to their address, phone numbers, all current and previous addresses, relatives etc.
its not end of the world, but I guess people just don’t want to give out more info than they need to convey what they are trying to say.
the other side of it, is if they complain about the car or say something bad, like slander, or lie about something then Tesla could know who the person is. If it’s slander maybe even take them to court? I’m pulling at straws here
The other side of that of course is that if something terrible happens, car manufacturer could suck up to them by giving them perks or sending them some promo stuff or something. To make sure they didn’t lose a customer and an advertiser (since Tesla relies on word of mouth). But I don’t think Tesla would do that. Other manufacturers maybe.