[Noseshine]

> the "enlargement penis" spam works because the average person is not that selective on the ads they chose nor the websites they visit

I don't think you understand "average". It's the extreme tail of the distribution that is targeted by such ads.

Example:

> Nigerian scam emails 'deliberately implausible'

> New research from Microsoft suggests that email scammers maximise profits by entrapping only the most gullible.

http://www.telegraph.co.uk/technology/microsoft/9346371/Nige...