OK, I'll play although necromancing threads is not my thing... Let me tell you a story, a real one. A client calls me - he needs parts for his 20 ton excavator and he needs them urgently. The machine broke on the site, they have a time frame, blah, blah, blah. I find the parts and try to call him back (on his mobile.). 2, 3, 4 times with no success - the phone just keeps ringing. After two days he calls me, furious, because he never hear from me - I'm, obviously, responsible for a penalty fine from his contractor. When I explain, calmly, that I DID try to call him back, but he did not answer, the explanation was: "Oh, I never answer unsaved (unknown) numbers!". And I'm like: "Oh, OK! (click)". Now, do you understand my point, Rachel?