[arethuza]

I remember one place where one guy - who was very experienced and a generally awesome developer had a rather unpleasant (i.e. plain rude) manner when asked worked questions even though he was generally quite pleasant about non-work topics.

He eventually admitted he did it on purpose so that people would explore every other solution to a problem before giving up and asking him (inevitably he would almost instantly know the answer - he was that kind of guy).