Not to mention Astral Hazing was coined by Cyberzombies, and all the flavor text and Jackpoint talk suggest every awakened anywhere near one of those puppies saw the Bad Juju without issue. And it was apparently like staring in the face of Cthulu.
Skin Walker is a Blood Adept specific ability, and since Blood Magic pretty much outright says 'THIS IS FOR NPCS ONLY, DO NOT GIVE TO YOUR PCS,' it's only ever gonna come up if you're using a Skin Walker against your PCs. So yes, 99% of the population has an Intuition+Perception (4) test to notice the blight on the universe walking within 6 meters of them, but 25% of the average 'runner group, cause they're always gonna have a mage, will notice when their Magic rating suddenly tanks 4 points.
Heck, even the Adept without Astral Perception is gonna wonder when you go "okay, you approach the diplomat. You just lost Killing Hands, Critical Strike 4, Combat Sense 2, Improved Ability: Unarmed Combat 2, and Mystic Armor."