Even if boundaries were put in place someone is always...
If nervegear existed would people use it to evil end like in SAO (Sword Art Online)
Even if boundaries were put in place someone is always going to find a loophole or just break the rule entirely and do it just by saying it is a bad thing to do is not going to stop someone from doing it. Why would you kidnap the target when someone could see it when you can kill some by simply hacking into their nervegear device or if you know the person you can just remove the device form the person while they are using it and they are dead just like that. The nervegear device no matter how much good it would bring to the world of gaming it would ultimately be used in ways that people probably wouldn't have though of like making a game like the one in SAO where the user cannot log out. This would be used to keep them their until you get what you want and if they don't tell you well they can stay trapped in the game forever. Having someone stuck in a game like that knowing that with one step out of a safe zone or city you could die and not see you family or friends again would be traumatising to youth and adults.