Sure, in the past maybe goodies were given more leeway as far as killing neutrals is concerned, but does that mean that the imms can't decide as a group to change their mind?

In the past you could summon elite dwarven guards into your cabal and rank on them, but the imms changed their mind and made summoned mobs worth less.

In the past you could quaff a potion and have sanctuary, but the imms changed their mind and nixed them.

In the past you could pick damn near any lock without having a set of lock picks, but the imms changed their mind and made picks necessary and made locks have a difficulty level.

In the past you blackjack people while dual wielding a pair of daggers, but the imms changed their mind and now blackjacks are necessary.

In the past battleragers could wear Tarus' bracers, but the imms changed their minds and nixed that practice.

Just because goods used to be able to kill neutral mobs without prejudice doesn't mean that tomorrow the practice won't lead to -15 exp.