wow! very powerful. And if on a Land we have to be so careful about LH think of how much more we need to be Makpid on people...
except when we have a chiyuv to talk about it...
In his podcast on the W****r scandal, R' Dovid Lichtenstein quoted a sefer from one of the gedolim in europe (I've forgotten which one) which stated at length, that worse than those who speak Lashon Hara when they shouldn't, are those who keep quiet when they should speak out.