I totally agree about your first paragraph. The inability to deal with pk scammers, led us today in this PK system.
About War System, yes dying is part of the game, and l2 is a hardcore game. Everyone wants to play pvp, or try at least. The problem that i mentioned in the original post, is that the War between clans, should be a different thing, than the random pvp for hunting spots, or castle sieges.
If a clan wants to go full war, so be it. But the 5 kills triggering war, takes away the opportunity from someone, to defend a hunting a spot. Also, Wars, should not be triggered as well in castle sieges.
If there is no possibility for NC to remove the 5 kills trigger, at least, they should give the chance to terminate a war instantly, with a kind of penalty or something, without searching which member is in combat mode somewhere in the map, afk for ever.
In every situation, the War system, has flaws, and at the moment, is working for the benefit of the bullies. The game should give the chance and the opportunity to everyone, to pvp whenever they want, and also, to defend themselves, whenever they want.