Why do people have these things in or over their ears when they are at work (not those being worn for health and safety reasons) but listening to music or podcasts in the office and in a job where they need to answer the phone or work questions from colleagues. It may help them concentrate on emails or working on a document etc and want to get on with it without disruption - we would all like that but unfortunately human contact is part of the job where I work.
DH does this at home as well - and all very well on the odd days he is home on his own - I work outside home full time and we do need to talk sometimes without the look of stop disturbing me.
Am I being unreasonable in objecting to ear buds?