Lol, I'm on the other side of the counter and let me tell you what I have to deal with...

2 feet from a garbage can people will drop their fast food bags and a case of beer. Apparently it's my job to clean up after them.

They let their kids touch absolutely everything in the store, putting things where they don't belong, pushing their fingers through packaging and they don't bother to stop them. Apparently it's my job to put it all back.

If their children pee on the floor next to the toilet and then rip the toilet papper off the roll and onto the floor, it's my job to clean up after them.

After stirring 10 creams into their coffee they leave the creamer packages and stir sticks on the counter, right above the garbage can.
(apparently that's my job as well)

As they are buying their gum/soda/cigarettes they open the package and leave the wrapper on the counter for me to throw away rather than drop it in the garbage on their way out.

They walk into the store and without looking around for the half a second it would take them, will demand to know where a half dozen things are.

OR, they walk in and ask for a few coffee cups, a handful of napkins, plastic forks for ("how many" they ask person with them), one of my large trash bags, straws and, oh yes, some matches..... AND THEY WANT IT ALL FREE!!!

They get pissed when I don't let them dump 3 large 33 gallon bags of garbage in a dumpster I have to pay to have picked up.

If I catch their eyes when they walk in I'll say "hello". Many can't be bothered to return it.

I've had people mad that I don't carry items that even your average grocery stores don't carry.
Yesterday a woman was mad because we didn't sell bottled water by the case. (it's a small store hon, I don't have the space to store enough to sell it by the case)

They will hold open a glass (see through in other words) cooler door while deciding on which flavor Soby they want without a thought to my electric bills.

On a septic system, they can't be bothered to understand that there are times when it's just not working and so they yell about it as if I saw them coming and sabatoged it myself for spite.

If I run out of newspapers they bitch at me about it as if I'm hiding them from them.

If their credit card or ATM is declined they get mad a me. (and then ask if they can write a check - I don't think so)

People send their kids in to make purchases alone when they lack the basic skills required to do so. I can't tell you how many times kids have bought something, paid for it and then decided they didn't want it, or wanted something else. Once a kid gave me a $5 bill to buy something, I gave him his change, a few minutes later he changed his mind and didn't understand why I didn't give him his whole $5 bill back. After 5 minutes of explaining I sent him to his parents to deal with.

Obviously I could go on but basically, people suck and whomever coined the term "the customer is always right" is an idiot because the customer is usually a pain in the ass. :)

So while there are plenty of people who shouldn't be in the service industry, there are plenty who likely just had to deal with a few idiots too many that day. :)

...... Kendra