Netflix's original price was unsustainable. Netflix has yet to bring in a penny of profit, and is funded by its outrageous (and equally unsustainable) stock prices.
Netflix's management failed to attempt a more gradual, acceptable price increase with the possibility of additional features. Their brazen statement of, "you don't have to purchase our product" rebukes and enrages a small (but loud), spiteful portion of their subscriber base. The consequences may not be severe on stock prices, but especially displeased customers may attempt LulzSec SQL injections and ddos attacks on netflix.
They've killed their competition, only for find that there wasn't much money left in the whole industry to begin with. Blockbuster and Hollywood Video are giggling in their graves.
And, a small note, Youtube.com still has yet to make a penny of profit either.