While defending wait stealthier in cat form, do not stand too close to the flag or a scouting rogue might discover you before 4story Gold players see him. If you are facing overwhelming numbers, cast Hoots, Dots and switch into bear and hopefully last till help arrives. Use frenzied regeneration and NS (if you have it) to heal yourself and swipe as many targets as possible around the flag. Moon-spam level 1 is the easiest way to prevent flag captures - remember that hurricane won't prevent flag caps. Don't fight out in the roads! Fight near a flag. Let the enemy go; don't be drawn away from your flag. Do the kitty stealth thing: when defending a flag or moving to take a flag, stealth in and take out the cloth wearers; that's a feral druid's best role.