Being a student certainly doesn't make you an educated person. University life is effectively just another 'time-passer' to keep kids in education and give them "hope" that when they finish they'll be the next Richard Branson.
The 'Big-Guy' used force, but I don't think the kid would have walked off if he was asked nicely would he? The logic is this; how much force would you use to remove an abusive person who didn't want to be removed?
In a perfect world the police would have been called and the train staff kept the kid there until they arrived, but for a train that has to adhere to (or at least marginally) to set arrival /departure times it is an unforseen circumstance, how long will the police take?
I don't agree with "he was forcibly thrown to the ground", he wasn't he was 'pushed' from the train because that's the only way of removal and if the kid was moving forward at the time of being pushed then the force would be greater in forward movement.
It's effectively now a video that will go out to all the criminally minded and non-law-abiding to show that they can profit from such and the more times the innocent are punished, the more they can get away with.
I'm not angry or in a furure about this however, the decreasing attitude of the law-abiding and non-law-abiding alike quite depresses me.