Day and Night Mobs

[Lemuria]

hogs always notice you, drakes are blind and you can move around them as long as you dont run (same with some others), cobolds have sight aggro etc.

Decided to test this theory. Used Disciple of the Land, walked in front of the hogs in South Shroud. No aggro. Used Ninja and stealth, walked in front of the same hogs. No aggro. Not exactly true sight so far. As for the drakes, I set my movement speed to walking and strolled past a drake. Got aggressive when it looked at me. I'd love to be wrong on these points, but unless we're talking about very specific examples of these mob types, I've never encountered the same situation that you apparently have.

Are there specific exceptional enemies that have these aggro types?

Update: Okay, I found at least one good example of sound aggressive monsters. Jellyfish, such as Sea Wasps will aggro you even with their backs turned. I suspect the same may be true of some other waterkin enemies.