Are you seriously willing to make the argument that that (which is the common way to smoke it) is not harmful ?
I mean, shred a paper, burn it, watch the burning threads rise. Now imagine these things on top of alveoli in the lungs. Despite their tiny size those threads are hundreds to thousands of times bigger than those alveoli. Now think of what happens to these things, when held against ~215 degrees celcius threads.
Harmless. Clearly.