This is an experimental post. I'm making it with Javascript disabled. I correctly saved the previous text to into SMF drafts
https://bitcointalk.org/index.php?action=drafts , still without Javascript.
While writing this post I looked up some information on this forum in a separate window of the same browser, still with Javascript
disabled.
So it just looks like Cloudflare is requiring Javascript only to set up some ephemeral cookies when first opening a browser session. Once the browser session is started Javascript can be disabled.
Now I'm going to try to post it, with Javascript still disabled.
Edit: It appears it went through without a hitch. I'm now editing it with Javascript still disabled. Please post your experiences using your ISPs because Cloudflare is known for using various amounts of defensive technology for various ISPs and various traffic conditions.
Edit2: Further along this Cloudflare discussion, I went to a different site that is also using them for DDoS protection. In the past that site used to show the same Cloudflare screens about "Checking your browser". That other site didn't make that challenge this time at all, still with Javascript disabled. I know that this "other site" is nowadays not under attacks anymore, they are just using Cloudflare out of inertia.
Edit3: I just wanted to save my previous edits, still with Javascript disabled. Worked fine. Another variable as far as Cloudflare is that I'm typing this from a less popular browser. On the same computer I have bitcointalk.org opened in a very popular browser with most recent updates. In that browser Cloudflare re-challenged with "Checking your browser" despite the fact that I didn't close that other session and the ephemeral cookies are still present.
Edit4: So the summary is: YMMV (your mileage may vary). You can certainly browse and post on bitcointalk.org through Cloudflare with Javascript disabled. Just use tools less popular amongst the DDoS crowd and other script kiddies.