I have a couple that I have previously mentioned, but will mention again to help you out.
The first one was from a year ago and some girl in the Canada pavillion was mean to me. I wanted a stamp in my autograph book (I'd been collecting them from the countries) and I waited an insane amount of time letting kids cut line in front of me (I guess they didn't know I was in line. The parents must have thought I was standing there for my health). After like 20 minutes of this (and yes the cm knew I was there the whole time), I politely asked her if she could stamp my book between kids so I could be on my way. She responded with the comment "Welcome to WDW, we're here for the kids." That comment just angered me because places like WDW, while special to kids, need to make the adults happy too or there won't be anyone to take the kids.
The other was on my trip last July. My friend and I wanted to do E-ride nights (we were staying in AKL). The problem is that she was a cp and cms apparently are not allowed to go to e-ride nights, even when they meet all requirements by staying in a room, paying for the room, and are willing to pay for the tickets. We were told conflicting stories by the gr cms and it was quite frustrating and angering. After GR had said no that morning we were disappointed because central reservations had said they thought it was okay. Later, we saw them passing out wristbands at splash and I asked him why cms couldn't do it. He said they definitely could, we were given wrong info, and to go to GR and buy the tickets - that there wouldn't be a problem. GR said no again and were rude about it. When I asked for a manager (at this point we were mad because we'd been given the runaround and we'd just walked all the way to city hall from splash only for the e-ride tickets), no one came and the cm wouldn't get him/her. I was very polite about it and after requesting a manager again, she went backstage and came back willing to sell the tickets, but she did so with attitude (like the way she swiped my card and acted about it. It was like the manager had said to just do it and she didn't really want to). The whole situation was bad and quite frustrating. I would have mainly wanted them to make sure all the cms knew the rules so no one else will have this happen (the whole several conflicting answers thing). I wrote a lengthy e-mail on this to GR (the only thing I've ever formally complained about in my life!) and the response was a 3 minute phone message telling me that they're re-evaluating e-ride nights and that cm's definitely are not allowed to attend them.
Both cases were what I'd consider horror stories. I have some good ones too if you need any good stories. Good luck on the paper or project or whatever.