So freedom of speech is only morally necessitated if it's deemed to be in the public interest? That sounds like you're setting a restriction on speech.
For example, if a car manufacturer (or bank) makes public claims that their system is secure, yet they use 56-bit DES keys to encrypt data, then I think the public should know.
Your "account number" analogy was off because it's is generally not in the public interest to reveal a private citizen's account number.
However, if an account number (email address or ip address) was being used frequently to commit crime, say in an advance fee fraud, then it makes sense to blow the lid on the said account number. That's what I meant by "in the public interest".
In any case, if you're being that pedantic, why didn't you notice that I actually asked revelation that question, and not DJN?