I believe I am abnormally kind to recruiters: I respond to most of their emails even to simply say that I am not interested, and if any of the positions do sound decent enough, I happily pass their contact information off to other developers that are job seeking.
However, if you are a recruiter and you contact me with one or two sentences that do not describe the position nor the company in the slightest bit, I will ignore you. If you contact to me in this manner more than once, I will report you as spam.
How do recruiters that do this even stay in business? Surely they can't be pulling in good talent with practices like that.