decaying skeletons should be non-kos
 

I was surprised to be unable to find any references to this within the forums when searching.

Decaying skeletons (the lvl1-2 mobs that spawn in newbie zones almost everywhere) should NOT be KOS. They were always indifferent with the only exceptions being in Kunark where just about everything scowled and apparently also in nektulos (but AFTER the revamp).

I seem to recall them only being indifferent to necromancers.

I recall *all* undead being KoS and fearless, meaning a lvl 1 decaying would still aggro a standing lvl 50.

I have no definitive proof either, but I recall all skeletons/undead being KOS -except- the level 1 decaying skeletons.

I strongly remember decaying skeletons being non-kos also.

I've been meaning to research and make a post on this topic. I know for sure that in some areas that the decaying skeletons did not aggro, but it is possible they did in other places. Unfortunately I've yet to find any proof on it other than memory.

I'd like to note that the skeletons in Dagnor's Cauldron don't behave like typical undead: they group aggro with water goblins and they start running at low health. Similarly, some weird stuff is going on in Unrest, where many of the undead (e.g. tormented dead) are threatening instead of scowling, and the death beetles (though they're not undead) never aggro you unless it's group aggro or you attack them even though they're threatening. I don't know how much of this is intended or correct; it just struck me as odd.

Iirc death beetles shouldn't aggro unless you engage them first.

Yes, Death Beetles are currently working as intended.

In classic: decaying skeletons were social, but nonagressive.
The only ones that were scowls were the Field of Bones decaying skeletons in Kunark.