For me it depends...if I am playing socially with friends and just for fun and i touch a ball or something slight I do not...BUT ifI am playing someone I do not know or in a tourny ect ect I call everything on myself
Part 1: http://www.youtube.com/watch?v=apd9Kz6UpkU
Part 2: http://www.youtube.com/watch?v=BuZnF1htKhM&feature=related
Part 3: http://www.youtube.com/watch?v=Sxd9ndg3JQk&feature=related
Part 4: http://www.youtube.com/watch?v=T6JwrW_9xKA&feature=related
Part 5...
I wondered the exact same thing I was just too lazy to make a thread lol. I think they would be very good with little practice at games such as this and maybe even one pocket.