Hehe, actually Lysimachus of Thrace asked Seleucus to behead the recently captured world-infamous Demetrius for either 200 or 2000 talents (I think it's the latter, not sure.) Of course the noble Seleucus denied if only because he thinks its cooler for the restless Demetrius to drink himself to death being locked up and forced into peace.

Perhaps that's why CA don't implement it in.