The Victoria line was royally knackered this morning, so my train from Walthamstow to Liverpool Street was rammed. I was all squashed in with the crowd, minding my own when I realised I hand a hand squeezing my bum. I could not turn around due to not having any space and I was too shy to say something. I ended up being touched up for a whole stop. What should I have done? I was a little intimidated and I did not notice who it was.