A critical element in the still vs moving water comparison is that a fish in flowing water typically does not have the time to make a close examination, it is more of a "now or never" situation for them; whereas, this is typically not the case in still waters.

With respect to the 'cigarette butt' comment, I have personally observed this on a couple of occasions. Once when a 'clown, was watching a feeding trout, and intentionally flipped his cigarette butt to it just to see what would happen. Idiot! We have all had fish slam our strike indicators while ignoring our offerings!