When a bad person dies when is appropriate to address them as such?

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So this girl that sent me death threats in high school went missing and before she died I wrote her true persona through my own eyes. I got threatened with a defamation lawsuit and apologized. Then this guy in our old friend group sister kind of came for me. I said the dead girl was a bitch and lets not try to remember her as a saint. I don't regret it.
When a bad person dies when is appropriate to address them as such?
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