I hate customers. I really do lol which is amazing that I worked with them for so many years.
I used to work somewhere where a lot of office workers would cram in at lunchtime. They would queue 30 feet to wait to order a coffee and then be shouting when it wasn't ready in 30 seconds because they had to get back to the office cos they had spent all their time queuing. I even received a phone call one morning to say a customers daughter had food poisoning from a take out sandwich. I started to get out the appropriate forms to send off, asked the lady when she had eaten the sandwich, she told me in the evening, on asking where she had kept the sandwich all day, she informed me, in her bag. I asked her if she had seen the "keep refridgerated" sign clearly on the front and back of the packaging and she told me not to be a sarcastic, stuck up b1tch and she was going to report to my regional manager. So I gave her his number and she didnt even embellish what I had said, so nothing was done. Customers are majoratively wrong in my experience.
Although the most unneccessary whinging I have ever experienced was whilst I was on the maternity ward. I have never heard anything like it... very glad to get out of the door.