[Someone]

I am not upset at all; I merely point out that, IMO, they should not have disclosed any of their client's data, no matter how small.

IMO, there is customer data on their servers that they should not disclose without the consent of their customer. If so, the moment you allow a service provider to expose some information without such consent, you are accepting the fact that there are is a border (no matter how vaguely defined) between 'OK to disclose' and 'not OK to disclose' data, and that it is up to the service provider to decide where that border lies.

Because of that, I think a provider should not disclose any information about their clients, no matter how tiny, even if the information cannot be traced to any particular user, unless their terms of service clearly state what they will disclose (or sell to third parties)

(And yes, I _do_ read terms of service)