I have this hub, with the Pi Zero:
I know that I need to power the Pi via the USB power port and that the Hub is powered a separate power supply; provided when you purchase it.
But I'd rather not use lots of wall sockets - I already need 10 for my current computer, so I'd like to use 2 or less (including the screen).
To achieve this, I would need to power the Pi from one of the USB Hub's ports. However, I don't want to damage the Pi of course - so is this safe to do?