I am nice person, at almost all times. When the phone rings and they start their line before I can even finnish saying hello, I then interupt them by asking if this is a sales call, yes or no. I ask repeatedly untill they stop talking and I get a yes or no answer, and when I get a "Yes", I tell them I"m not intested. If they take that little hint, and say goodbye gracefully, they are off the hook, and my phone is back ON the hook... if they don't take the hint, I say a firm "Thank you, Goodbye", and hang up. Even if I don't ask to be removed from the list, call backs don't happen often. Just my way of dealing with this annoying little detail.
