Unfortunately there are so many faketaggers around that it's getting impossible actually respect the hostile tag.
The most recent stuff I've seen is kingdoms tagging up hostile, doing real hostile with another kingdom, and then hitting into a significantly larger kingdom just before they press the war button.
Why is this tactic being used ?
If ppl start tagging hostile when actually having hostile, and removing it as soon it's over I think more people would respect it.
Also you should always try to contact another kd instead of hitting into their hostile. Thing is, if you can get away with it, that's probably fine. But you never know when you re going to stumble upon someone who doesn't give in easy, you wanna fight for days ??