I never ordered food at home where I live, and certainly not in the United States. One thing that really worries me is the "trust factor"; Not only do I have to trust that the restaurant staff won't spit into my food or otherwise contaminate it, I do too Likewise I have to trust the person who delivers it, who most likely doesn't love his job / life and can do something with my food out of defiance, especially if she chooses not to like me for some reason.
An extremely cheap and elegant solution would be if the food area put some kind of cheap but effective "custom sticker" on the food packaging so that I could at least be sure that it would not arrive at my door between leaving the food area and being opened. It could say the name and logo of the restaurant with a little text:
IF SEAL IS BROKEN, DO NOT EAT AND CONTACT US ASAP!
This would cost them practically nothing extra, but would give me a lot of rest. It is also in line with numerous other such "security measures" that apply throughout society today, so it would not be a fancy thing to suggest or do so.
This would be especially useful for pizza boxes, but I've never seen this in a movie or anything, so I'm worried that it couldn't be done. It's really an important reason why I don't want to order pizza to my home. Just the idea that the deliverer opens it and spits on it (in a way that is not obvious to the customer) makes me restless.
Is that already done? If so, it is consequent done? Or just from a few big chains?