This says everything. This is stealing IMHO. I always hated cloudflare and services like this. I also do not like theymos to use cloudflare for the forum but that's a different story.
I am not sure why you are so against Cloudflare, probably theymos can tell us how much they have saved bandwidth of trash traffic has on this forum, just because of Cloudflare. I agree that is no sense to use such a service where anonymity is expected. but it pretty good doing their job.
Now, my question is - how to I find a site is using cloudflare's SSL and Google Analytics?
You will spend too much time to check every page, do they have CF SSL and Google analytics, it can turn into paranoia. OK, I agree to check, where is privacy expected.
I guess 95% of all serious websites use GA. it has become a mandatory part for any further page optimization.