I used to follow Zoe Voss' blog and she seems to be a pretty down to earth girl. I cannot blame anyone who gets in this business considering we all have sex. To get paid for it is a bonus. Not to mention the fact that the asshole who sent her that HAD TO SEE IT. So how can you fault a girl for doing something that you obviously condone by your obvious consumption of said activity and product?
If I was a girl with the body and moral strength to do this (because you have to be strong mentally to do this) I would fuck my brains out for fives years or so and call it a career and try to marry some nice rich mope.
Which, Zoe Voss probably will do. As long as you stay off drugs and be diligent on testing (yours and the talent), could be a fun career.
That angry little turd who wrote that should just do himself a favor and off his own fucking ass. No one will miss him.

That is my two cents.