haha i yelled at someone(an employee at an insurance company) on the phone today too. like at the top of my lungs at them! I felt bad afterwards though
don't feel bad, i used to fuck with them all the time. once, when they called and asked for my parent, i started sobbing and yelled "my parents are dead you insensitive prick!" and slamming down the reciever. with a job like that they have to expect it lol!
Well maybe the sales person will realize that their job sucks and what they are doing sucks, and move onto some thing better. Your actually doing them a favor.