u/Obliviousnobvious

I have been noticing with a lot of my leave at door deliveries ( which I love by the way) that customer have decided to come out and meet when I didn't ask them to ( I find it very annoying and suspicious). I don't understand the logic of them requesting leave at door, but then deciding to turn it into a meet and greet. I tell them you requested a leave at door, so I have to take a picture by the door, which many act surprised or shocked by it. I take my picture because I don't need nor want them claiming that I never delivered their stuff. Does this happen to you and how are you handling it?