> A national "whitelist", where hospitals, doctors, utility companies and such can register to get their numbers whitelisted perhaps, combined with a setting on

> A national "whitelist", where hospitals, doctors, utility companies and such can register to get their numbers whitelisted perhaps, combined with a setting on phones that block any non-whitelist number. Of course it would be abused, but a properly verified caller id system for all the big ones; the inland revenue, the major banks, would mitigate 9/10 scam calls I get each day.