Then you get a screen shot of the chat list with your death message and no chat from him warning you before hand.
Then you do the sanction report and he gets done for not 'declaring' before engaging.
I honestly don't know why people have such a hard time typing 'engaging' or 'hostile sighted' or something else thats short, easy to type fast and means your gonna be firing in a few seconds.
If I can do it in an LF within 5k of who I intend to shoot at (while being swarming by those frigging gnat like kusari police NPCs) then alot of others can do it within 3k in a VHF or bomber.
EDIT: Fair enough, my other point still stands though, it's rediculously easy to warn someone before you fire on them.