Wow -- our virtual friend Lenny (
) could have made a small fortune with this, having double the fun at the robocaller's expense -- both time AND money! Too bad "he" wouldn't be able to appreciate it fully, since "he" doesn't really exist (in human form, at least).
I have a niece, now a teacher who, as a broke college student, did this. Before she stopped getting calls she made enough to pay a few years worth of the family's cell plan. Might have helped that she got permission to use a law office's letterhead (her mom had worked at for quite a few years) for her demand letters.