I don't put this topic in "Survival Guides / Game Help" to ask is it normal and "Suggestions" to say that it can be "abused" or something, so I put it here.
As I know, if you're in party, you can sneak infront of your party members.
It means, if Person A (later just A), B and C tagged D.
So A B C - members and D is a leader. All of them can sneak in FoV of ABCD easily, but also they can see each other.
I don't know what will happend if A will tag B, B will tag C and C will tag D (A->B->C->D), but I think A can sneak only infront of B, B can sneak infront of A and C, C can sneak infront of B and D, D can sneak only infront of C.
Here's something:
You're a sneaker, you can always tag your victim, then enter sneak, and then untag him and... you just casted invisibility spell! Because you can enter sneak in his FoV.
You see a sneaker, tag him, and he'll never hide from you, well... he can use sneak now in your FoV, but you'll see him anyway, because you're in one party with him.
Is it supposed to be so?