If you own a website and you really think this is a slippery slope, that it crosses some line in your sandpit, you can stop using Cloudflare. But worrying abou

If you own a website and you really think this is a slippery slope, that it crosses some line in your sandpit, you can stop using Cloudflare. But worrying about ad injection off the back of a legit good-guy action seems like an overreaction. They've always been able to alter the websites they serve. They do frequently to optimise and this seems like a very benign extension of that. Don't get wet before it rains.