Engineering360: "Turning cigarette butts into bricks"

" . . . the team believes that fines and penalties would need to be issued to those who do not discard cigarette butts into specialized containers."

Ummmmm . . . and just who is going to enforce this? I hate to generalize this as I am sure there are some thoughtful and considerate smokers, but the majority don't really care about themselves or anybody else, so why do we think they will comply with butt collection schemes? This is just a silly academic exercise. Yes, it is technically feasible . . . .