Personally, I would throw them in the trash and save myself the trouble....
but you are right, as far as I know they are typically not water soluble so therefore snorting wouldn't do anything, unless they are broken down in the digestive tract... I could be wrong but I think I have read this before.
From what I know most people smoke them. The dose is much lower than THC, and much much lower than actual cannabis weight-wise. Be sure to measure and limit doses if you do use. Know that these are not cannabis what so ever and are much more dangerous, can cause seizure, serious bodily harm and even death.