Before I start: I must admit, my friend once pressured me into trying this, but, of course, it didn't work. The way that your nose absorbs cocaine is the nasal cavities recognize it as a friendly, useful substance. Marijuana will just register as a bunch of dirt in your nose.
Snorting keef is paramount to building up a good ol doobie booger.

__________________
Both my father and my self are legal users of medical marijuana, and support its legalization for all uses.