It's apparent from that statement that you've NEVER been a server! With a bill that high, it took more than 5 minutes just to get their order!
Having been a waitress, I can empathize with the girl’s rant, but she used poor judgement on where she put it. The restaurant where I worked paid less than minimum and we were allowed to keep our tips. It was the hardest job I ever held. The first month I cried every night when I finally laid down to sleep. The pain in every bone in my body was agonizing. We not only waited tables, we were told, “If you can lean, you can clean.” And we had to do “prep” work. Than meant slicing onions, cheese, tomatoes; making salads, tea, etc. If things got slow, we cleaned every crook and cranny, right down to the lattice work on the walls and all the antiques. All that plus being under constant high-stress trying to keep up with orders and demands of customers. No indeed. It is not a cushy job.