I'm not saying polo are essentially in the wrong, they may need to take these actions to protect themselves and their other customers... but the entire alt exchange system needs to be more distributed. One huge exchange and the rest dealing in crumbs is not healthy. It is open to manipulation for sure.
If you made a fortune on X/Y/Z coin, you would be very happy. You lost out so you're upset, naturally.
That's the risk you take entering the alt-coin domain and when the bitterness subsides, I think you'll agree its part of life, move on and dive right back in.
Could there be more spread distribution? Sure. Will it stop flash-dumping when 1 exchange delists it? I doubt it.