Tea and data retention policies
Tea is absolutely at fault - would they operate in the EU they would totally be afoul of the GDPR. What a bunch of idiots.
I'm not making up excuses for the absolute scum bags that released the information, but that information should not have been stored.
Do people even think? At least in my work place we do. And work hard to have only minimal data, because we don't want to deal with this kind of carp. And don't want to do the necessary work to be allowed to store this kind of data, let's be honest, correctly implementing all of the requirements is a hassle. Don't store data, if you have to store data, minimise it and protect the hell out of it. I'm currently doing a security audit for the internal services I'm responsible for and I'm glad to skip the really tough tasks.