I don't think most of them are pieces of shit like her though. People respond to incentives, there's not much incentive or hedonic gain for most of us to mess with each other's food. If you think me tipping you $7 on top of what you are being paid to do a delivery is some sort insult and you poop in my taco, I'm not going to tip you more next time. This is starting to bleed into a discussion about tipping which is about as fun as having an abortion discussion in the US, so on that note I'm out