Stooopeed!
"the drones need to be kept within line-of-sight at all times"
So the operator / operatress(?) walks along with the drone, which means that instead of the pizza (not that the stuff D's sell is related to that) being delivered by a motorscooter it will arrive at walking speed.
Alternative plans: https://what-if.xkcd.com/149/
Biting the hand that feeds IT
