I'd like to say that she DOESN'T speak for every waiter/waitress/manager/cook/bartender (since when are kids in bars?) out there on this subject. I worked in restaurants from the time I was 16 through the end of college, and yes there are bratty kids, but at the same time there are many more very well behaved and polite kids that come in. And for the most part a meal is a meal, the more people at the table the bigger the bill, and the bigger the tip.
I also think it's funny how she points out how little the wage is for tipped workers, but fails to point out that in most states if a tipped worker gets so few tips that their hourly is under the real minimum wage, then they get paid the difference by the restaurant, so no matter what they make at least minimum wage.
Serving people is all about attitude, and hers sucks. I knew people who would make $200+ in tips in a night in a Denny's style restaurant (Friendly's, up in the NE), simply because they had a great attitude, and understood that there's bad that comes with the job, but it's far outweighed by the good. They enjoyed what they did, were polite to people, did their job well, and were rewarded for it.