I commute to Manhattan every work day and it maes me sad every tie I hear an accident or alleged pushing on people onto tracks. It's time the city makes changes such that accidents are prevented and people are rescued.
I live in Seoul, Korea and all of the subways here have it! Its just a normal thing and it drastically cuts down on accidents. Plus, they still manage to charge the equivalent of $1 USD per ride on the Seoul subway. Safety isn't an option, you must begin installation on stations if you want people to be safer.
I take the train regularly and have always feared falling or witnessing someone fall off the platform and on to the rails. We really need Platform Doors, especially with the recent accidents on January of 2013.
It's simply inexcusable to not have some sort of protection on the platforms. Especially when some platforms are packed to capacity during high times. Will it cost money? Yes. Would this be one increase that I feel is actually justifiable? Yes. I rarely take the trains and that is because I have always felt unsafe on the train. These recent incidents have just amplified that fear. The answer is not to tell people to stand away from the platform when many times the edge is so congested that there is no other place to stand. I always stand by the wall until the train has already passed my location, but it may not help. I just watched on the news (with yet another incident) that a woman was grabbed and struggled with a man who was intending to throw her onto the tracks and he succeeded. Start trying to protect the millions of people who ride this system each day.