For our land-line I did the government 'do not call list' which seemed to help. Also, I don't give that number to any entity unless they're pretty trustworthy (i.e, banks and such.) The only telemarketer/evil person that's called me recently (last year or so) is the random-dial one with the loud boat horn (twice in maybe 6 months.) That one sucks, because it's a recording so yelling at it does no good.