Something important to keep in mind is that capture the flag is for
girls. Sometimes you will see guys in there playing but it's either because some girl asked them to play or they are otherwise wussified. I make no assumptions about the guys I see playing flag other than they would probably rather be playing battle.
Girls get angry when you sink all the enemy boats in a game of flag. I'm still not entirely sure why it upsets them so much but then I don't really understand girls in general.