Frank Warren started a website that collects secrets mailed to him on postcards . I printed up 3,000 self-addressed postcards inviting strangers to share an artful secret on a postcard -- something they had never told anyone before -- and mail it to me anonymously . Comment: When secrets are shared publicly , they can help unite people , he says . Warren : The site has received half a million secrets since its founding in 2004 .
Frank Warren started a website that collects secrets mailed to him on postcards . Comment: When secrets are shared publicly , they can help unite people , he says . Warren : The site has received half a million secrets since its founding in 2004 .