* Don't live in that place because there are negative influences upon people there. C. C. 4:10:41.
* Don't hang out with so & so because he behaves with arrogance or anger or wastes time from Torah study etc , and you have to avoid so that you do not learn from his negative ways.
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The explanation for these exceptions is that the primary prohibition of Loshon Hora is when the intention is to demean others & rejoice over their shame , but to protect others from negative influences is a Mitzva.
Now may be a good time for a gem of Torah study.
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