I think no matter how you slice it though, it's unethical and reprehensible to coordinate (even a shoddy) DDoS leveraging your visitors as middlemen. This is effectively coordinating a botnet, and we shouldn't condone this behavior as a community.
P.S. Shout-out to dang for dropping the flags. I have a small suspicion that their may be some foul play, given the contents...
I don't think this is true. I run my own recursive DNS resolver, and get a CAPTCHA when visiting archive.today.