my favorite is the guy at our work who asks you for help, so you go to whoever, wherever the pc is, start looking at the problem, and half way through he says, "oh i got to go for tea, you alright to keep looking at this"...
we also have a guy who just cant be bothered doing things, so he comes up with some stupid excuse not to look at a call during the day, then we end up getting called out at night because he couldnt be bothered..... unfortunatly modern law prevents me opening a can of woop ass on this guy, because when you get called out at 3am for something he should have fixed during work hours, you just want to put him in a blender.
Fortunatly where i work most people seem to deal in conjecture and rumour, whilst i deal in facts and evidence, so anyone who has tried dropping me in it in the past has quickly found themselves undone.