My GM did this to me. I was hiding with a sniper rifle, and he declared that an astrally-projecting mage automatically saw me (I did not get to roll Sneak or anything), told a rigger where I was, and had a drone shoot me (I did not get to roll Perception to notice the drone, nor did I get to roll Sneak against it). I had invested heavily in Sneak, and it didn't matter in the slightest. My new character has no ranks in Sneak, because honestly, what's the point?