As a former Dispatcher for a large regional airline, I worked right next to the crew schedulers. They had a really evil way of getting pilots to call them. First they'd call the ops. station the crew was arriving, and tell them to have the crew call Dispatch. Then, sometime around when the crew was supposed to call, they'd come over to my desk and say "If Captain Smith happens to call you, transfer him to me when you're done talking to him." So, the next thing I know out of the blue, Captain Smith calls, and I"m like..."uuhh...yea....what did you need?" and he's like, "uh, nothing, what did you need?" and I'm like, "uh, nothing, but come to think of it, Scheduling wanted to talk to you, one sec."
In a few days I caught on to what was going on and put a stop to it. You have to admit though, that's pretty evil!