Call Of Duty : Modern Warfare 2
The plane carcasses offer limited cover, and provide camping areas for players, however constantly killing enemies from inside the planes cause enemies to begin to use explosives or use FMJ to shoot through the weak metal walls, for a revenge kill. Spawn Trapping is ultimately useless, unless with an experienced full team of 6 or 9 players, as the map is very small, and players moving into spawns is very common.
Although it may seem less obvious, using UAVs on Scrapyard is wise as it gives a good idea to the team where the enemies are spawning, as it is usually very random. Predator Missiles or Airstrikes can take out large groups of enemies, as well as the Stealth Bomber, which can potentially wipe out an entire team if placed correctly. The Chopper Gunner is always useful, but is bad if short on time as it takes a long period of time to reach the map.