I had one yesterday from 'Microsoft (something)' - very Asian sounding....I just kept saying I couldn't hear him, then told him he must have a wrong number and hung up.
Some good ideas here though!
Buy Coke, charlie in Wollongong (signal ID - CONOR.61)
Msg Tel .gram @berrygreen11 - buy coke 420 in Adelaide







and he put the phone down on me! 
