Oh you will not notice. The pages can easily be spread out between residential IPs using headless browsers (masked as real ones), unless you really pay attention you won't see the ones that want to hide.
Every single argument against Cloudflare's features highlights exactly why people use Cloudflare so much.
You're talking about people setting up a botnet in order to scrape every scrap of data they can off of every website they touch. Why on earth would anyone be okay with such parasitic behaviors?