I play in a more realistic group, If a someone tried something so decidedly malicious like that ...I'm quite certain he or she will get a Holy sword to the face courtesy of said paladin - even If they are someone's pc. Me being a dm allows it. Though I have yet to act on this rule, it helps that most of my players are actual, capable roleplayers and not a bunch of impotent, cruel oversized-children as sadly is the case of many dnd players. Hmm, maybe I should introduce japan to table type Roleplaying.