> Which kinda proved my point. If your daft enough to share to anywhere on the internet, it's not 'inadvertent'.
Well, we could argue about that. For example, the inadvertent part could be that you didn't realise that every photo you took was by default backed up to to iCloud.
Another example is iMessage. You only have to look at results for "imessage appearing on wrong device" ...
https://www.google.co.uk/search?q=imessage+appearing+on+wrong+device
... to realise how it's possible to think you're messaging one person you trust implicitly, when in fact you could be messaging several people you don't trust at all. More examples of inadvertent sharing.
But why bother arguing about it? Whether it's deliberate or inadvertent, there are definitely lessons to be learned by those who can't or don't think through all the consequences in advance.