Not quite a DYKWIA but a 30 something wandering round with headphones on and a mobile phone clamped to ear under the headphone.....wandering round with hands in pocket and TALKING REALLY LOUDLY. So much that you can see folk turning and looking at him cos he’s THAT LOUD.

Eventually I give him a good long hard stare that stops him in his tracks - he looks and gives me the thumbs up and takes the hint and sits down.

With headphones on - you have no perception of how loud you are speaking.

Oh and by by the way - I am profoundly deaf and wear powerful hearing aids so that gives you some sense of how LOUD this guy was!