I've got the Moab as well, and used it on my 600k and on DMD. (Flipping amazing battery life). Like Brandy said, I tilt it generally down. If a car approaches with high beams on, I flash it up at the car, briefly, as you would flash your high beams to get them to turn theirs off.
So far, so good.
Sarah
When it's easy, ride hard; when it's hard, ride easy.
2011 Volagi Liscio
2010 Pegoretti Love #3 "Manovelo"
2011 Mercian Vincitore Special
2003 Eddy Merckx Team SC - stolen
2001 Colnago Ovalmaster Stars and Stripes