[michaelt]

  You further agree that if [...] if Cloudflare, in its
  sole discretion, deems it necessary due to [...]
  other reasons, Cloudflare may suspend or terminate
  your account without notice to or liability to you.

I gotta say, that statement isn't very helpful in letting people know what to avoid doing.

[kbar13]

these clauses are pretty common for this type of contract. it allows the service provider to not have to worry about whether or not their contract allows them to kick an abusive customer off their platform.