Fair point but by the same token it cannot hurt to go about your business and not do anything that annoys others. If in doubt on what annoys others sit still and do your work with the minimum of fuss.
E.g. This guy at work loves to just talk and talk and talk. And he is never wrong and has an opinion on everything and anything. Irritates the hell out of me but I cannot do anything. He is in IT support and we keep getting told that talking is the nature of their job. OK. So why are they in the same office as us?
It would not be fair to say that our jobs require thinking and not talking.
The same person loves garlic tuna and loves eating it at his desk.
The same person also loves to put food in ceramic dishes and when he eats ensures that the spoon or fork constantly scrapes and scratches the bottom of the dish until every single piece of food has been scraped up.
The same person loves to put food in his mouth as often as possible and while his mouth is full of food turn around and conduct conversations with other staff. This is not just irritating but is also extremely disgusting.
This same person also comes and sits on my cluster of workstations (3 desks connected together and partitioned) and starts kicking the leg of the desk which sends vibrations through the rest of the desks.
This same person also has an iPod with leaking headphones and plays heavy metal music full blast.
Those around him tolerate his behaviour and do not say anything so it would appear that I am in the wrong. Personally I just wish he would go to hell and let me get on with my work in some peace and quiet. It is difficult enough commuting and living alone....