Though I refuse to link to any of them, there's a slew of online petitions signed by constitutionally illiterate Americans who wish to "retry Casey Anthony" because they dislike the verdict from her first trial. Of course, the constitution's fifth amendment bans re-trying a defendant because you didn't like the first verdict; among other things, it says "nor shall any person be subject for the same offence to be twice put in jeopardy of life or limb." That clause was done primarily to prevent an out-of-control government (or judicial lynch mob) from jury-shopping, trying the same defendant over and over and over again until somebody, somewhere, agrees to find said defendant guilty.
Conventional wisdom says "Civilization is only three missed meals away from mob rule." Nancy Grace fans and the signers of those anti-Anthony petitions say "Why wait to skip three meals first? Lynching's no fun on an empty stomach."