Come on people
It's the same shit every day with this.
'x' company launches a service that will benefit the majority of normal users who don't give a fuck about their photos other than how they can get Aunty Jean to see them who knows fuck all about computers.
People start screaming about privacy, security, etc.
Seriously, fuck off. The vast majority of people don't give a shit about personal security of their imagery, as can be seen by the social media deluge this last decade or so. To them, it matters not a jot if Google, Yahoo, or their neighbour has the images, as long as they're there, somewhere, and accessible.
If you really do have privacy concerns about your family photos, then dig yourself into a hole in the ground and seal yourself in, because that's the only way you'll be safe. If it's business imagery and it's your own, then the chances are you'd never use this kind of service because you (should) know that the second you upload your imagery online, you have lost control of it - regardless.