The criticism you make of this board would be highly pertinent if it were against a board for something that were urgent to stop quickly instead of an old problem people are just "getting-tired" of "now."  Personally "I" appreciate merely this opportunity to view what "other" recipients of nuisance calls experienced, sometimes just to sort basic "nuisance" calls from some which might be a deeper "threat."  Also, hopefully without my coming-across as unduly-critical or confrontational, your attempt here to "scold" these basic "information-sharers," into "leaping" into becoming "crusaders," will "destroy" something that "is" valuable, without "creating" "anything."   Some of this so-called "mere-defensive" information on here is sharply "enlightening--;" like two respondents' warnings to the fact that these predators unauthorizedly "sample," one's "speech," or "voice" pattern for later "abuse."  There is so much more admonition that I could present you with, to furnish the context, or to drive-home the point sufficiently-further, although I am constrained by comment reply length limit.  Can you furnish link to yr own blog here?