How about those guys that ask a question, and then another question, and another after that, and then some more... And all of the questions are not so much related to the topic as they are to something specific they are currently doing and cannot solve at the moment. In the mean time, the rest of the room is rolling their eyes and waiting for the whole thing to finally finish.
One should always be aware of the significance of the question, time constraints of the talk and the rest of the people in the room.
Or how about those guys who ask a question, then follow up with another question without really listening to the answer. They're up at the microphone not because they really want an answer, they simply want to ask 'gotcha' questions.
One should always be aware of the significance of the question, time constraints of the talk and the rest of the people in the room.