Lesson 1 Don’t repeat lashon hora that is common knowledge. If you look at all the conditions necessary to allow the repetition of this information, you will find that the lenient opinion is only applicable in extremely rare cases. Furthermore, even if all the conditions are met, the chafetz chaim was not resolved whether we can rely on this position.
Lesson 2 - recap of all the conditions a. the repetition of the information cannot be purposeful, only if was incidental b. 3 people had to have been present, you cant just assume they wee c. if one of the 3 are the type who don’t repeat lashon hora, you cannot count it as three people d. only if it is repeated in the city it was originally heard in e. If the initial speaker indicated s/he doesn’t want the info spread, all bets are off f. has to be one person relating it to three (not any other numbers or categories) g. you cannot believe what is repeated at face value h. you cannot add to the narrative i. you cannot repeat well known information about past misdeeds if they don’t do it anymore