Hi, Cuerno,
Let me see. On bolt action rifles, Winchester, Ruger and Mauser lock the firing pin independent of the trigger. Remington blocks the firing pin and the trigger. On semi-autos, the AR-15 type blocks the sear; the M1, M14, M1A and Mini-14 lock the trigger and the hammer. On some pump and semi-autos with cross-bolt safeties in the trigger guard, the trigger is blocked, but in some cases, it is one piece with the sear, so the sear is blocked also. So I think it is safe to say that most rifle safeties do not just block the trigger and are quite safe against firing if dropped as long as the safety is on.
Jim