i think this is a great idea, and to show the effect such a feature would have, ive got some screenshots of:

unfiltered: http://www.mehwhatever.com/profile/pics/listqvq.jpg

filtered: http://www.mehwhatever.com/profile/pics/listuwu.jpg

it makes a real difference, it drops from 111 to 47 people thats a lot of... fluff. those accounts arent necessary in the 60 second list imo, and i fully support implementing this