Either way, CloudFlare is a part of the problem. They're either protecting booter services (thus necessitating your use of DDoS protection in the first place) or terminating the booter sites without "due process".
It's relevant to mention that CloudFlare already does terminate a class of sites without "due process": malware hosts. What makes malware hosts that much worse than booters? Answer: CloudFlare's IPs can get blacklisted for it.