I totally agree with you, AMH (my initials, too!)
I have a Bachelors degree and a very good full time job, I also work part time at a women's clothing store for some extra $$ (and the discount!). It seems that there is a whole generation of comsumers who have never been on the other side of a register and have no idea what it's like to work hours on end with the public. There are good days, there are bad days, there are days when everyone is in a good mood and days when, well, I think you understand.
I will share this short story and leave it at that....I was helping a woman put together and outfit for a black tie event she and her husband were going to. She was very indecisive, but pleasant and I had no problem helping her and chatting with her. Through our talking we discovered that we were both invited to the same event. The look she gave me and the way she literally looked down she nose at me when she said "Why would YOU be going" made we want to tell her how the shirt she was wearing made her look like a stuffed sausage. As soon as I told her what my full time job is and that I work at the store for fun, she practically wanted to adopt me. It was like, I was a nobody. A peon working at a clothing store and my only purpose in life was to outfit her.
I see it at least once every shift I work; adults, twenty-somethings, teenagers even who think that because they are buying some clothes (or whatever, it translates well into any retail or service industry) they are somehow superior.
No one is perfect, no job is certainly perfect, or even ideal for that matter but as long as the good aspects far outweigh the bad, no one needs to go scouring the want ads because every now and then we get that one customer/client who tests our abilities to deliver good customer service without letting our true feelings slip out.
Which reminds me I have to go to my part-time job tonight...