The Tale of the Seemingly Illiterate One

At the laundromat there are sixteen dryers. Two of those dryers, #8 and #16, are marked "Employee Use Only". The only exceptions that I make are if all the other dryers are full and I am not using them for something. However, there are quite a few people who try to use these dryers even when there are plenty more. Usually when they pile their clothes into one of the dryers I don't say anything, waiting for that joyous moment when they realize what they have done and quickly remove their clothing before anybody (like me) can notice their mistake. Of course, what they don't realize is that I always notice. Then there are the others who are lazy. Once they realize that these dryers are designated for employees only, they walk up to my desk and ask, "I know those are for employees only, but can I use them? I've already put my clothes in."
Now I must explain that the reason that these were designated for employees only is because those two machines will usually not register it when quarters are put in. Rather than have a sign or get the problem fixed, my boss figures that he will let only us use the dryers, considering if the machine eats our store quarters at least he gets his own money back. So I often tell the lazy people, "Well, I'd prefer that you use another dryer because that one sometimes eats your quarter and I wouldn't want that to happen."
Them being lazy people, they usually risk the 25 cents. Guess what? It eats their quarter. Then they have the gall to come complain to me about their big loss. Boo-freakin'-hoo. Of course, I give them their quarter back. But I don't like it.
Then there was this one lady. I couldn't believe what she did. It started out like a regular mistake. Or so I thought. She put her clothes in the employee dryers, and at this time the big sign was taped right over the slot so there was no way customers could not notice it. I wasn't paying attention to her, as I was folding some clothes in the back, but soon enough she came up to me complaining that the machine didn't register her quarter. I asked her which machine she was using, although I already knew the answer. Surprise, surprise, it was number 8. I calmly explained, "You see, those dryers there always eat people's quarters. That's why we've put a sign up saying that only employees could use them."
"There was no sign!"
Confused, I peer at the slot. Hmm. No sign. Strange, it was there a minute ago. Right before that lady came in. . .
"Odd. Well, I'll give you your money back. But please use a different dryer next time." I give her back her money and notice something familiar sticking out of the garbage can. It's the sign! I wonder why she would have chosen to rip that sign off the dryer when there were other dryers without signs, then claim that there was no sign. I figure it was because she couldn't read, and must have thought that somebody stuffed a piece of garbage over the hole just to stand in her way. Of course, it couldn't be because she was too lazy to move her clothes to a different dryer. . .