Everyone hates recruiters, fine, I get that. It doesn't change the fact that like you, they are also trying to make a living. They also have friends and family that give a shit about them and despite the fact that they may be exceptionally annoying at times, responses like this are simply rude and unprofessional.
6 or 7 no replies is "I'm not interested" in normal person speak.
Wrong. 1 reply of "I'm not interested, please don't contact me again." is normal speak.
Sorry Matt but your response does you no favours and it certainly doesn't educate the recruiter in question.