I don't usually tip for take out, except for the small mom-and-pop restaurants, or if the cashier is really kind and goes out of their way to be helpful. Same with Dunkin. I'll tip if they are really fast or nice. I've been there, I know what it's like to work in that environment. If you are a slow POS who can't listen or is clearly frustrated you have to work, then no tip for you.Good, stay out. Helps keep slow people and people that are angry out of the place and keeps the line more efficient. BTW, I don't tip at any fast-food place.... You had the option for NO TIP. It was the largest, most prominent bar on the screen for you to touch.