Hypersmurf said:
But again, Bane is an area spell - it affects creatures that fit the description even if the caster is not aware of them.
This is true according to the rules of the book.
But, this is not true solely according to the description of the Bane spell. Only when you add the concept that "enemies are ones that are unfriendly to you" does this apply.
Btw, according to a LITERAL reading of the Bane spell, the enemy description, and the unfriendly description, Bane does not affect "opponent zombies". Why?
Because Bane affects enemies.
Enemies are unfriendlies.
Unfriendlies wish you ill.
Zombies cannot think, hence, zombies cannot wish you ill, hence, zombies are not enemies.
Now, I do not know of a DM who would rule literally like this, but that IS the literal rule.
Also, you are USED to Bane working this way, so you might have a harder time agreeing that Bane NOT working that way is ok as well. We tend to be more comfortable with what we are used to and new concepts are quickly rejected because of that, not because of the merit of the new concept.
This is illustrated here by the fact that you are very resistant to the concept of me picking my own enemies. However, this is a natural thing for people to do, just not the definition of enemy in DND. Like I said early, both is correct conceptually and I think this is just a poor decision in the DND system. I pick my enemies. My enemies pick themselves. Both, not just one.
As for who is an enemy, I was going to suggest the following yesterday:
AA - A
AI - N
AE - E
IA - N
II - N
IE - E
EA - E
EI - E
EE - E
This is a model of either definition of enemy taking precedence over a definition of ally. In other words, if I think you are my enemy or you think I am your enemy, then you are my enemy (for purposes of spells, etc.). The only time you are my ally is if both of us think you are my ally. This is more complex, but it allows for the Bane spell to affect anyone I want it to AND anyone who really wishes me harm. The reason AI and IA are not allies is because an Ally spell should not be intrusive like an enemy spell is (although Aiding a neutral character is intrusive, so I could also see a case for AI - A, IA - A).
So with this, enemies is "either case true". Allies is "both cases true".
I doubt many DMs would go with this though.
Btw, I'd like your careful consideration of the following scenario.
NPC A is PC B's brother. NPC A likes PC B, but PC B hates NPC A because NPC A is an assassin.
NPC A is hired to kill PC C who is a friend of PC B.
PC B casts the Bane spell. Does it affect NPC A who is at the moment, trying to kill PC C?
According to the literal book, it does not. NPC A is not unfriendly to PC B, in fact he likes him because he is his brother. So, NPC A is not the enemy of PC B. PC B's feelings on the matter are irrelevant.
Is this how you rule as a GM?