I am not a fan of public cuppings either, however, I am a fan of public comparative 'tastings'. Comaprative meaning either/or same coffees by different brew methods, or entirely different coffees to compare a high grown vs. low grown, Central vs. African blah blah blah. you know what I'm sayin'.
I think pro cuppings are evaluative, not comparative (though thy could be at times). So put me down for a dis-liker of public cuppings.