The objections I've seen so far to this draft specifically cite
problems from systems such as "transparent web proxies" (which are, in
my experience, usually far from transparent) in the network which
intercept all traffic, regardless of destination address, sent to
specific well-known ports.
A quick read through draft-cerpa-necp-02.txt suggests that it's
primarily targeted at forms of redirection which occur at the request
of service operators. Such systems are best thought of as a funny
kind of application-layer proxy, and are far less damaging to the
end-to-end internet model than the transparent proxies cited above.
I think it's important to carefully distinguish between these sorts of
redirection. Some clarifying text in the draft to this effect would