ETA: This was on the main page a while ago, and now that I've been reminded I remember.

I apologize if someone has already posted this, but here's a link to a Tumblr of Men Taking Up Too Much Space on the Train.

In some of the images it looks like the train isn't very full, and in that case I myself would be tempted to put my bag beside me or take up a bit more room, but most of the pictures are just... sigh.