I don't have a horror story. Sorry, my one time at WDW was awesome, the half dozen times to Disneyland were just as cool.
My Friend Angie, was a CM. A great horror story she had was a little bit funny. She was a tour guide for a Chinese group, when one of the mothers decided while literally walking from adventure land to the front of the castle decided it was time to change her toddlers pull up. The mother got the bottom off and the poopy pull up, when the little buy decided to wrestle out of the hold she had and run up forward on the group. Now Angie is telling the front of the group info about the pavement between AL and the castle courtyard, and sees this little toddler boy with his wang out, pun intended, running and peeing freely with a mother giving chase with a poopy pullup in hand and poopy behind on the boy. Of cousre Angie has to call in for the pee and poop to be cleaned up on a busy promenade.
Our Vacation planner Dale, shared a few stories. One stuck in my mind. He had a family he thought was hell bent not to enjoy them selves. Dale said he got nasty review by a family who couldn't for the life of him seam to trust the planner he put together for them. The best example, he set a day at MK. Charter breakfast at Chrystal Palace, Fantasyland rides and meet n greets, lunch at Cosmic Rays, Afternoon in Tomorrow land, Dinner at Chef Mickeys and Fire works viewing at the Contemporary. Dale said they argued that the Planner was a guide and the reservations and fast passes they set up, could be used any time and that Disney should have accommodated when ever they decided to not use them and walk into a place demanding to be served.