Yeah, its just so cool to release info that could potentially cause the deaths of innocent people..... 
I'm divided on the issue... even though it might cause harm it is also a new/interesting phenomena that hopefully will reveal the dirty deeds of corrupted governments. Diplomatic transparency might upset the world order a bit but I think on the whole, is for the better. It's a good reminder for the people in power that they should fear the people and not the other way around.
Imagine if the Russian people found out about what Stalin and his thugs did during the 1930's, he'd be hung from a tree in no time. Biggest reason why he could rule and terrorize people unchecked was just because the russian people didn't know enough about him and his actions. Something similar to Wikileaks might have prevented that.