Well there's only one reason to DDoS others servers.
Like L2Tales and L2Vadc administrator do.
To gain popularity and players.
If a server with 1000 players lets say closed from DDoS these 1000 players will go somewhere else to play (like L2 Agony closed).
More players = more donations = more money.
Simple as that ;)
About the topic (ontopic) :
It would be a great idea, and if you do it i will be the first one who will reward you ;)