I know, it's a PvP server. And I want to play on a PvP server. But I see no sense in having high level characters be able to kill lower level characters. Nobody plays on a PvP server because he wants to be killed by a level 90 player at level 30. People play on a PvP server to do compelling world PvP, and that isn't the case when a level 90 character ganks low level characters. There is not a single good thing this brings and taking away the ability to attack players that are, let's say, more than 5-10 levels below you would not cause any harm to PvP servers.