i'd think it was a safe assumption to not trust any more computers on the island.
its also a safe assumption that you should not leave a hostage alone so you can go play more warcraft.
when the fight first started, kate and sayid had to hold their own while locke was playing video games. he didn't come in to join the fight until it was over. then, he was taken hostage by a guy that they had taken hostage, which he didn't help with, and only because that guy was left by himself. by locke.
then they fight again outside and locke gets beat up again while the one-armed sayid kicks even more ass.