Put it this way, I've flown to europe, south america with two 4 pair ski bags with racing skis ranging 155-220cm and 2 pairs 190 pow skis, and I've gotten away with telling them its just 1 pair with vices, boots, clothing gloves in there. If you duct tape it up it helps too, taking off bindings really helps too. Atomic 10-18s slide on and off so it helps. I travel with 3 bags and I only ever pay the extra bag fee.
Now I just travel with 3 pairs sx skis and 2-3 pairs pow skis, same deal though. If you smile and if they ask, its just 1 pair, one really big fat pair with gear.
Sometimes you get a bitch on her rag and there's no way you're going to win... luck of the draw.