my point is that you and others are so obssesed about chabad and internet and tznius, what about lashon hara which is worse. then you went off track and are trying to say not to take chazal literly about lashon hara kineged kulam. and you made a whole cholent of different inyonim.
each sugya has its details i.e. chilul shabbos is not doche pikuach nefesh, but a mumer for chilul shabbos is pusul to shecht, giloy aroyos is the other weay around. see tanya perek 25.
regarding the effect on the nefesh the alter rebbe says lashon hara is the worst.
