Potential (if lame) fixes:
1. Kill the leaver.
2. Auto-abstain the leaver.
3. Post-pone the game via Imoutobot. (No further actions/voting allowed?)
4. A forcible end by majority vote of the remaining players.
5. Auto-kill the exited player by the yandere the next night.
6. The leaver's actions/votes are stripped from the total required.
Potential (if lame) fixes:
1. Kill the leaver.
2. Auto-abstain the leaver.
3. Post-pone the game via Imoutobot. (No further actions/voting allowed?)
4. A forcible end by majority vote of the remaining players.
5. Auto-kill the exited player by the yandere the next night.
6. The leaver's actions/votes are stripped from the total required.
... Uh...