What harm do you see in Amazon delivering to customers' houses or cars? Surely it's more secure than leaving it out on the porch.

Now it's ok for them to not only record your voice in your home but to get into it. The home is the last privacy frontier.

What is an option today becomes mandatory tomorrow. It might not be much of an option once every market place does this and you can't practically use brick and mortar stores to buy what you need.

Why do you think people lock their home and car doors?

To restrict access to those trusted to hold a key.