There's a great three part series[1][2] (well, parts one and two are great) at the Kernel magazine on recruiters as well as an expose on the top recruiting scams[3].
[1] - http://www.kernelmag.com/features/report/2401/tech-recruiter...
[2] - http://www.kernelmag.com/features/report/2403/tech-recruiter...
[3] - http://www.kernelmag.com/features/report/2404/the-10-sleazie...