Speaker Stands Filled With Kitty Litter? TRUE???

I know that speaker stands should be filled with sand or lead shot for weight, stability and providing a good base for the speaker performance.

Recently, I heard people saying stands can be filled with KITTY LITTER! Is this true? Anybody else know about this, or is it a bunch of hooey? If it's true, how does it compare to the traditional fill materials?
Thanks.