Its a good question, I even thought about it myself, a lot of people will blur out the last 6 digits of their vin number if posting a pic of their fender tag, or if they are posting the vin, its not with the tag, I guess one or the other, but I wouldn't post your whole vin with your fender tag..lol. Even if you did, its a risky business to try and steal the identity of someones car, and woudn't be worth the risk.