Parents, are you tipping enough at restaurants?

What parent hasn’t surveyed the aftermath of a dinner out with the kids — the food chunks on the floor (or smeared on the wall), the sugar packets dumped out on the table, or the memory of little Jimmy spontaneously jumping from his chair and nearly tripping the waitress — and thought: just how much does the waitstaff here hate me? And more importantly, how much do I now need to tip them to make up for this mess? Read more here.