Posted April 08, 2019
The don't-quote-PM rule is modkillable not because it's more severe, but because it's game-breaking. It's the equivalent of displaying your card in a secret Hitler face to face game. Whether done accidentally or on purpose it shifts the balance of the game to one side in a big way.
Imagine you being able to post screenshots of your role PM in mafia. If that was allowed, all town would do it immediately, and game is practically over since mafia team can't do it easily. Quoting PMs verbatim is a similar offence.
So in such cases a mod-kill is warranted. Even if the PM quoting was done accidentally (e.g. I thought I had something else copied to clipboard and posted quickly without checking). If there is no malice involved, a mod might still allow the mod-killed character to win if his faction wins.
Double-posting, being, posting during night... etc on the other hand need not unbalance the game. They should still be punished, including a modkill if done often enough or with intended malice, but not straight away, keeping in mind that the modkill itself might unbalance the game more than the original offense. In such cases asking for a modkill is bad form in my opinion. If anything, it should be taken with the mod through PM first.