Ok, the Chol Ha’Moed is over and I can respond.
ROB, there is indeed a ma’amar Chazal telling us to judge certain people le’kaf zechus. However, when it comes to ma’amorei Chazal, you have to know exactly where they apply. Misapplying them could be harmful. This is exactly what you did. When “judging le’kaf zechus” is stretched to the degree where you can’t criticize ba’alei aveirah and consequently they can do their aveiros with great impunity, it is a terrible corruption of the abovementioned important concept.
GAW, so what did you mean — I have not seen your previous posts?
Concerning the P.S. — you can answer that yourself.