They see recruiter contacts as spam and resent that recruiters are paid to make placements with money that they presume would otherwise go to the developer. Additionally they detest people who cannot program but work in the technology industry.

I prefer to take the same approach as the $450k Rails dev and always provide a recruiter with good leads if I have them. I have placed friends in good positions because of this and have the option to do the same for myself when I am ready to do something different.

I think the typical argument is that they send you non personal emails that seem to not know about your unique and talented gifts. Of course these people don't seem realize they're only contacting you to try and give you money.