We used to get them so often that we got another phone line and kept it unlisted. Used the original line for the computer (back when dialup was the way to go).
Now, if we ever get any calls, they usually ask for my dad. I tell them to hold on while I go get him. While they are waiting, I grab my bagpipes and play the worst, loudest, horrendous sounding note possible. (somewhere along a C natural, which sounds horrible with the drones tuned to B flat). I make sure I play it right into the phone.
Or, if my pipes are packed away, I go put the phone onto of the central vac unit (its out in the garage), and turn it on. Talk about loud.
Every single time, they just hang up and never call back.
Too bad we only get the dumb recorded calls now. Maybe thats for a reason.
