In 7th grade home economics (yes it was really called that and yes we were required to take it) we learned how to properly dispose of broken glass. If you broke a glass or a mirror or anything glass you were to put it in a paper bag, tape it up securely, and mark it BROKEN GLASS.
To this day I still do this whenever I dispose of broken glass.
Because if I don't? I may maim the garbage man (or woman).
I cannot have that on my conscience. Even if most garbage collection is automated these days and most garbage collectors never handle the garbage themselves. Because what if behind the scenes there is someone sorting through garbage that I don't know about? What if they are sorting my garbage and I haven't placed my broken glass securely in a paper bag and clearly marked BROKEN GLASS? What if they reach in my garbage and my broken glass slices off their hand? What if they are alone in the garbage sorting area and they bleed to death because of my improperly disposed of glass? No. Cannot risk that. I better wrap up my broken glass and write in huge letters on every inch of that paper bag CAUTION: BROKEN GLASS. Just once is not enough. I need to cover every side of the bag. Just in case they only see one edge of the bag and think it's just a bag. Nope. Gotta make it clear. Someone's life might be riding on my broken glass. I cannot fail them. Their life depends on me. Whoever they are.