Are you just assuming the light will cause distractions, have you tested it? My M80's sit right below my screen, granted they are black but have a shiny surface. My previous M60's were mansfield beach, again never had an issue. You normally will have your projector in the low light setting, assuming you have light controlled room. I guess I would test it first to see if you actually have a problem.
M80s-VP180-QS8s-EP600-2xEP350 Denon3808 Outlaw7700
(M22-OWM22-VP100)-all in storage