If you notice. The point of red-shift policy is that it is a gradual change so you aren't supposed to notice it or worry about turning it on or off. Yes you can turn it off for your computer, but you can't turn it off for other people's computers who might be viewing your content.
Yes, clients should be able to red-shift their stuff and I don't want Big Brother taking control and enforcing color profiles. At the same time some clients might want artwork to be displayed correctly, while normal/typical content is red-shifted.
If this becomes really common, what are the chances that web sites will Blue-shift their content (ads) so that it appears more vibrant on these displays? They could even serve different for each user based on location tracking/time of day. We'll need blue-shift blocking add-ons in addition to ad-blocking.