Technically you still can, just saying…

I think not. There is an integration, but it relies on the account. But my knowledge is based on some reddit posts so…

I love that meme format. Where is it from?

Seems a little over the top. The AP will consume additional power. Just restricting Internet access via router should be way easier.

Maybe connect it to WiFi, but instantly block Internet Access? Maybe it even has useful local networking features? (OK, most likely not)