Sad but true!
Dani's found some stats backing up delivery drivers (not all--about 28% of them), do the occasional hand slipping in the bag and grab unnoticeable amounts of your order:
500 delivery drivers did a study and they were asked how many of them ate the food they were delivering. 28% of them said yes.
But here's the interesting bit... Customers have also been asked the question: On a scale of 1-10 (10 being absolutely unacceptable) how accepting would you be if a delivery driver ate your food?
8 out of 10 people said it was all g.