I think it has changed. I have been attacked by people on the sea, and when I revenged them, later they were able to revenge me. That is being bullied not once but twice. It is one thing to be attacked in the wild or on the sea and then give the victim a chance to retaliate. But to give the attacker another shot at the victim for a revenge is way too unfair and should not be part of the game. Especially when attacking others and revenges are part of the assistant rewards.