I'd want one with hardware kill switch for any network connectivity. I wouldn't trust them not to do something stupid like automatically connect to open access

I'd want one with hardware kill switch for any network connectivity. I wouldn't trust them not to do something stupid like automatically connect to open access points, connect to mesh networks like google wifi or use 4g as a fallback (anyone do smart TV teardowns?) for small but valuable data. Aside from stupidity like that, having wifi on might be susceptible to vulnerabilities in the network stack or otherwise pollute the local airspace.