Dont touch !!
Isnt it strange that in a city of 10 million people and overcrowded trains people in this country are so anally retentive that they hate any physical contact. Have you noticed that even a millimetre of space is protected vociferously. You get dirty looks or the hip shove if you actually make bodily contact. The blokes think you are gay and women seem to think you are drying to dry hump them. Then you get those that use their newspaper as a force field even on the most crowded train.
Actually its suprising really that we havent had a commuter rage killing. But then how would you be able to use any weapon