Joseph,
There a countless examples of the Chafetz Chaim lovingly and tearfully guiding people to act properly. Please cite a single example of the Chafetz Chaim publicly berating and embarrassing anyone to convince them to do what is right. No Rav in his right mind would tell anyone to act in such a manner nowadays. Yet, you are insisting that any Jew can make the determination as to who is a rasha or kofer and act this way.
Seriously, dude, what is wrong with you?