The world is a weird place... Those things never happen to me; I only always get "super friendly" customer support when I want something I paid money for, but that is another story.
I also get lot of calls from companies that want to sell me lottery tickets and other dubious "deals". But I don't answer the phone if I don't see the callerID. So far, I don't seem to have missed any important calls.
Well... I used to get these calls, cannot say I still "get" them since I no longer answer... too weird, too pAraN0iD?