I tip. Drivers frequently seem a little surprised, but smile and take it. However, while we are on the subject of tipping... I'm pretty put off by tipping for

I tip. Drivers frequently seem a little surprised, but smile and take it. However, while we are on the subject of tipping... I'm pretty put off by tipping for counter service. You order at the register, when your food is ready, you pick it up at the register. But these Square and similar systems provide the business with the ability to but tip options on the menu: 10%, 15%, 20%, ... A particular ice cream shop in Palo Alto, and a particular Middle Eastern eatery in Fremont come to mind. Yes, you can skip the tip, but I worry about my next visit... There are also 1/2 service businesses where you order at the register and they bring the food out. You still get the big buttons with several tip options, and that's a little easier because at least they are doing something to earn it, but 20% to bring me my food? 25%? What do you folks think about this? Do we tip them because, hey, they can't possibly survive in Silicon Valley without 25% on a scoop of ice cream?