I don’t do food deliveries anymore but when I did, almost always did the food come in a paper bag that had a sticker over it which would let you know if someone tampered with it after the food was prepared, i.e. the driver. The drinks also came with a sticker over the top of it to cover both the lid and the insert for the straw so you’d know if someone removed it.

I’ve gotten them recently when doing curbside pickups at places like McDonald’s too.

I think streamers would know their food was tampered with. Unless someone was extremely careful, but that’s difficult when dealing with the paper bags and stickers.