[Swan]

This is a tricky one. I avoid London Underground at all costs, but sometimes i have no other choice but to use it and you often see people just mindlessly staring into space. This needs to be handled carefully imo, and it's going to be hard to differentiate the pervs from the people just daydreaming and wishing they didn't have to suffer the tube for another day.

If in doubt just sink your head into your phone i guess.