Wait,Google captcha and cloudflaire are two different services and are not dependent on each other.Cloudflaire is there to prevent Ddos attacks while captcha prevents spam bots.Having said that I agree captcha is pain in the ass.

Does you browser cache the temp data being typed ? If you're writing a lengthy post,it's always better to write in your text editor or keep a shallow copy of it somewhere.Admins don't care about your post and they shouldn't since forum's usability is more important than your lengthy post.