WAAAAA, WAAAA, WWAAAAA what a crock of noise. Don't trade on margin, you wont get liquidated. REALLY FUCKING Simple!
Exactly this.
If you are not aware of the risks in altcoin margin trading, do not trade them on margin.
And if you are bashing them and cursing and accusing Poloniex on the trollbox they will ban you as it is rude and will not help anything.
Altcoins and bitcoin also, have been growing fast and it is not that easy to scale up an exchange. People seem to expect them scaling it up to 35 000 users like overnight.