Most of these outbound call center people selling timeshares and vacations seem to be drunk or just plain fucked up before you get your phone call. Knowing that a head of time when they call me I like to answer the phone and quickly say “Hello is Amus there?”.
As soon as I do that is short circuits their fucking brain and they timeout and usually hang up. Since they are calling you they are wondering how the fuck you just called them?
I have been testing these for a while since those assholes at net2phone.com put me on a spam list for buying their phone service I have had a bit of practice.