Yes, I had a random idea and thought that an evil player can attack the evil Anbu of Rice Field. Same as the good players being able to attack the good Anbu.
This would be similar to Shinobazu in the forest, where you get an option to attack. Keep in note that once an evil character meets a good anbu, the sequence will remain the same.
You get the event alright? Say a good character encounters the good anbu of water country. They still tell you to stop and end up catching up to you. The player gets to choose if they want to (continue) after the anbu heal them or if they want to (attack) after the anbu heal them. Same as the evil anbu.
Of course, this would increase Chaotic demaenor, rather than alignment itself. There are always players out there that want to be sort of.. a rebel.
Think about it, the higher characters hardly ever need to be healed during a battle and when an evil character gets the anbu event from Rice, what does it do? Take up your time practically because we're hardly ever damaged.
Hopefully, you understand this. >>