> Those checks are a serious contender for worse thing ever happened to the web.
I couldn't agree more. And not only Cloudflare but also Google is increasingly imposing extremely heavy CAPTCHAs, which destroy experiences for many users. They should really think more about false positives too. (And the irony of course is that Google is the biggest scraper in itself.) Thus, please come up with something else than CAPTCHAs or heavy JavaScripts blobs in general.
Other sites with Cloudflare only take some nice twenty seconds, others just never ever let you go through.
Those checks are a serious contender for worse thing ever happened to the web.