You're being a little dramatic. It's incredibly unlikely that millions of innocent users have been blocked, and unless you have data to the contrary you shouldn't make such a claim.
You know what else is harmful to the concept of the open internet? The enormous malicious botnets and other endemic problems that require a solution like CloudFlare.
You know what else is harmful to the concept of the open internet? The enormous malicious botnets and other endemic problems that require a solution like CloudFlare.