i was at a comicon with some friends and i shared a room with one who snored, probably the worst ive ever heard, and after a few hours i said, 'roll over' - as thats what worked on my bf.
I didnt shout, just normal speech volume, as the idea is not to wake them up, just sort of 'rouse' them enough to turn over.
next morning she'd told everyone i SCREEEEAAAMED my head off at her ...
the general attitude of most of them was that as people cant help snoring, you have no right to wake them up to stop them, or ask them to roll over or anything.
i was so tired i almost didnt go to see Brian Blessed!
They were surprised when i said no to going the next year unless i had my own room haha.
most people eventually manage get to sleep with a snorer - i dont, i can hardly sleep even when im alone so theres no way id sleep properly, no matter how tired i was.
3 days & 2 nights of it, i felt like death on a plate.