Shooting the ship makes sense when the ship has traveled half way across the map and your team can not take the AA especially if your team is a MAN down. This happens quite often and so many players want to argue about the merits of shooting the ship instead of taking the AA. To those players I say this. Can't you see that we are a man down and taking the AA is not going to happen_
In the time it takes to fight for control of the AA and for the counter to roll and actually launch a missile at the ship your team could have shot it down quicker. (Plenty of times the ship is at one bar of health and instead of shooting it the team throws themselves at the AA one at a time to their deaths)
The best you can hope for is shooting it as a Team and bring it down fast to buy time for another player to join. Hopefully the new player joins and you regroup and go at it with balanced number of players.
The main reason to shoot the ship is that it buys you TIME.
Players are constantly dropping off and new players joining. So many games are won or lost as a directly result of that new player joining.
I'm sure if you did a search you will find plenty more post that tell you when to and when not to shoot the ship, but when you are in a game and a player says shoot the ship.
If you are in the above situation then Listen and don't argue.
SHOOT THE SHIP!!!!!
Update: If you are NEW and do not fully understand how to win Siege games, than Don't sit back and think you can shoot the ship while your team is going at the AA.
Follow the lead of the team and if its announced to shoot the ship then do it otherwise your are not helping your team out.
Edited by BurnsHot, July 14 2014 - 11:26 AM.