Just like junk mail, I'm sure that JW literature, tracts or magazines ends up in the garbage can just as fast as any junk mail. Most Witnesses must know this, but still they look at how many hours and placements they will add to their report. What people do with the literature, most JW's know.
I recieved my tract yesterday, and it went in the garbage can in no time.
In a way, they create polution, knowing that most of their literature will end up in the trash.