Tele Block feature - what does it really do?

[stevech]

I've checked similar sites and 90% of my annoying calls are local. My favorite trick is forwarding the ones I know to a local councilman's office or a porn line because the CID is the original caller.
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My choice, when I *do* answer, is to say "please hold on while I get the person that can decide..". Then I put the phone down for as many minutes as they'll waste waiting. I figure this hurts their measure of success and the rep will get fired.