I dont get what you mean by "take their time to actually be annoyed". If your annoyed then your annoyed. It is not something you really can control. I remember in undergrad for one class this same girl always asked a question EVERY SINGLE LECTURE, and yes some questions were valid, but on certain lectures where it was pretty straightforward her questions were ridicolous and you can easily tell she was just asking for the sake of asking. And yes...everytime she raised her hand, that was extra time I had to sit in that god awful boring class and yes, everyone in our row would roll their eyes at her every time. If you have a valid question...fine...if your asking a question for every lecture, at every hour, for every class...that to me just means you probably are not paying attention.