Panic's warnings were in good faith. Cabel's team clearly thought something was permitted, and was simply told "no, you misunderstood" by the review team at Apple.
Dash might be a better example. The account generating fraudulent reviews was contacted before apps were removed from the store. It's entirely possible that Apple screwed up by not communicating with the account used to publish Dash, but that's not what I'm arguing here -- I'm saying that even in clear cases of fraud, Apple usually talks to the developer first.