I probably am being unreasonable but...
Random one this one. I work in an open plan office that probably contains about 30 people on a busy day, in an area the size of two tennis courts. (Roughly).
The only noise is normal day to day activity, low level conversations and the occasional phone call. No machinery or radios etc.
A person who has recently started working here has taken to wearing ear plugs in the office. (Think noise reducing in ear defender type things that are used by people who shoot) when asked why they said it "helps them concentrate".
Now I suppose that's fair enough but this has prompted a couple of other people to start doing the same thing, including wearing old fashioned ear defender type headsets (think 1960s headphones) that block out all external noise.
Now we have three or four (depending on the day) people who are completely cut off from everything but their screens, to the point where you have to wave a hand in front of their face if you want to offer them a tea.
It feels a bit, well, rude.
I feel sorry for the people who have to sit next to them, because they are effectively isolated from any human contact for the entire day.
I can't see it being a management issue, as I don't think they are doing anything wrong technically. But it is making some people feel uncomfortable in work.
Is this normal practice?