some solid advice Heath and Stormbringer, thx
I personally believe that a Tactics skill should function only to provide information or observations of some tactical importance. Whilst essentially equivalent to "GM suggestion" in many regards, you should avoid making overt tactical suggestions to allow the players to make their own decisions.
Thats true, though i think a little talk with the player wouldnt hurt.
If he has no clue about tactics but wants to play a war vet in shadowrun, he will need tactical suggestions. Of course, the end choice is his, but need to flesh him some more info since he might have grabbed that skill just to cover his own deficiency as a player.
Like if for example i wanted to play an old Greek campaign, i would grab a tactic skill and abuse the GM for tactics questions. Specially ask for my tactic skill to decide my success or not on battle planning since i have no idea how phalanxes, etc worked back then.
An interesting option regarding the red herrings, would be for the GM to do his tactics roll hidden and adjust the amount of real in his info according to that.