Well said, "Dashy"...
I'm sure none of us users would like to see our "private" pictures circulating around your office or the net!!! hahahahaha... (many girlfriends would become very angry)...
But as others have said, we all should be aware that there is always an amount of risk when uploading information into a network... lan, wan, internet, whatever...
For instance, you couldn't prevent somebody from going to your personal public homepage at Dashwire and taking a screenshot of one your shared pictures and then post it somewhere else on the internet... that is something we all have to learn to live with.
My $0.02.