fire_dawg, I do believe it's illegal.
I have 2 cousins who took some of the ashes from one of their father-in-laws that REALLY loved golf, put them in a baggy and spread him over several places at the Augusta National during the Masters. It was hilarious....these 2 guys are crazy though.
They actually emailed me a picture of a piece they threw onto the back level of 18th green....it was shining in the sun.....unbelievable!!