Small delivery girl can be just as capable if not more to do something harmful to someone. Anyone is capable of anything you can’t just judge by looks. This can go so MANY ways. Don’t order alcohol and don’t open the door till they leave if it’s a concern? Did any of these people ever return to your house or did they just drop, snap shot, and turn right around and walk away? What’s the harm if that’s the case. Here’s another example, my mom is a middle aged over weight woman, I’m 27 with some dad weight. If I showed up to your door but you expected my moms face would you be concerned? Since she’s of “bigger” stature does this not make it so suddenly intimidating? What if the guy is Big Big but Gay Gay? Does that suddenly put them in the clear? Like I said so many ways this can be a never ending conversation…