I think it is the other way around. If you want to have your connected devices in a reasonable safe setup, create a wifi network for them and you decide if and

I think it is the other way around. If you want to have your connected devices in a reasonable safe setup, create a wifi network for them and you decide if and how they connect to the internet. This could be a mobile uplink, if you desire to, but I really wouldn't like each device on its own have an internet connection I cannot control.