Basically, yes. If it's smart it almost always has to connect to another piece of hardware and since your wifi is already there. Why not piggyback on it?

There used to be some "smart" devices that you could program to work off a clock that was built into the device or hardwire to a separate sensor or something like that but I think they're all gone now. Wireless is just too convenient and the data that can be taken from you is just too valuable to pass up.

"Locked down". Sure, I believe you, teacher who doesn't have the skills to really know what that even means. Even if you did know, when would you have the time to verify it? You're over worked to the point of burnout before you hit 30. Can you imagine what it takes to burnout someone in their 20s?

I'm predicting that schools will require all students to carry cell phones in the next couple of years. Even the elementary schools and kindergartens.

I'm old now and even I understand this. How does anyone under the age 40 not just assume this?

Business to Business. You (a business) are selling a product to other businesses. You don't deal with individuals consumers. You deal with the executives who decide what everyone at the company will use to do their job.

Alternatively B2C. Business to Consumer. This is probably what you would normally think of as a business. Making stuff and selling it directly to the people who will use it.