The ads, with flirty video that might be live or recorded years ago, shout at you with promises of "Live Sex Chat" and "Sex Shows", with both amateurs and "pornstars" alike.
It's a web red light district, and unlike some gaudy Dutch strip or seedy sidewalk, you're completely anonymous. The basic premise of the cam girl game is a simple one: You pay a girl for her time, and in exchange, she'll take off her clothes, talk to you, play with herself (and others), or any combination thereof.
If you think cam girls are bleakly stripping online out of desperation, you're also right.
Peel away the sex and pixels and money and you're left with the cloudy truth about the internet's relationship status with these on-demand entertainers: it's complicated.
Another threat noted by Bartlett comes from internet "trolls" who try to identify camgirls and ruin their lives just for the fun of it.
Many of the images obtained were very personal ones and could be used to either embarrass or blackmail users.
Reports in the UK say that NSA engineers helped GCHQ develop the Optic Nerve program.
He describes one nightmare incident, in which one camgirl, Sarah, was asked to post naked photos of herself on 4chan: one with her first name written somewhere on her body, and another holding a bottle of any medication she was taking.
As it turns out, Sarah had inadvertently provided enough personal information to allow 4chan users to track her down.