It seems like an easy way to disable it outright and permanently is a feature people would like to have. While noscript (and similar tools) would certainly solve this on a per-visitor basis, if we (CloudFlare) could provide a novel way to present an opt-out in the UI we could then report to our users how many of their visitors ultimately disabled the feature completely. This is just me musing about the possibilities, but overall that seems like it would be more constructive than our users thinking "Oh awesome, another one of those Apture things!" while their users silently grumble and block scripts..
Certainly providing a global opt-out would help your stance in that you care about the end-users, and not just the advertisers using the service. There are probably also ways to figure out how many people opt-out using no-script also.
