valerie wrote: 
Walmart has been talking about this for a long time and I'd say it really depends on
the situation. In one way, I think it is good. For example, take an elderly person OR
a disabled person that for whatever reason does not leave the home. Delivery for cold
foods to the fridge, would be very welcome.
In addition, you would know when the delivery was arriving.
No doubt it wouldn't be something for everyone but I can see how it would be a good
idea.
It is definitely a good idea and concept, problem is, with the growing threat of cybersecurity, hacking, etc, the information walmart requires to make this possible, if misused or lands in the wrong hands can be a disaster.
As far as elderly or disabled, if a person is still living home it means they have enough autonomy. And those who do not or have less of it are taken care of by their significant other, loved ones (family, friends, etc.) Though a service like this would definitely benefit someone who is alone, no family, no friends, no help, there again if you are able to get up and open a fridge and cook your food or prepare it, you have autonomy, therefore is it really necessary for someone unknown entering your residence and putting stuff away - what about the footage captured of your house, inside, what if it lands int he wrong hands ? This could be gold mine for burglars.
We have grocery delivery services here, some big chains offer it, they deliver the bags to your door, at most they might come inside the doorway and put the bags down. With technology comes misuse. In 20-30 years maybe sooner, most of the stuff we will order online and/or using VR, and drones will deliver our Amazon goods through the chimney or through specially installed chutes from your roof, leading to a locked room that only you can access
Grocery delivery will be a standard in the future as it will likely be too dangerous to even get out of your house, it will likely be trained military who will walk the streets mostly.
I think Walmart though should tighten its vetting - only requiring 1 year is not enough IMO.
We live in a world of evil and disgruntled workers, what's to say that the worker did not inject poison or spit in your food or whatever else, like in restaurants - We had stories here on the news about restaurant delivery horrors, needles in meat, apples, etc. So whether it is a HUMAN delivering the groceries and putting it in the fridge or a drone or robot, same - high tech can be misused and IS misused.
Though one thing I should say, this concept is brilliant, BUT I think the home owner should do a few optimisations in their home, like setting up cameras around the house - Burglars will usually target ignorant home owners, and will not likely go to a home knowing it has not only alarms but has cameras everywhere, so providing the consumer has safe proofed his residence, then yes, I think this service would be great, providing also you can dish out a couple of thousands of $ to safe proof your home, and also people using that service when they are not home should only leave access to the kitchen, and lock other rooms (bedroom, guest rooms, any other room that can be locked, other than kitchen.