Why? I'm simply being polite and saying 'excuse me' so I can easily move by you as you talk crap to your equally as rude companion and take up the whole path/walkway/supermarket aisle, not a care in the world that you are inconveniencing other people.
No need to give me a dirty look!
What is wrong with these rude people? Next time I will barge past you and knock that doughnut/copy of Daily Mail/Big Mac out your hand!
Am I being unreasonable?