Interestingly, I was told at the police station in Warsaw that I was not meant to doze off on trains and as a result it is my fault that I got robbed.
well, maybe you were sleeping, then it is partly your fault. Polish trains are just as safe or dangerous as most others. In over four years of taking Polish trains (long distance 5 or 6 times a year, commuter train about 30 times) I have never been robbed or had anything stolen, although I did witness a pickpocketing incident once.