[Baron Grazic]

That is exactly what happened to me in a PBW game.
I had a cloaked scout Escort ship travelling thru another empire's system and he cancelled the treaty saying I was spying on him. The Ship was destroyed by a mine field in the same turn. I asked for recompense and he said that I was warned via email which he actually sent after the turn was processed.
We have since become friends, but it remains a sore point.
It did send a big example for other races and they have kept well out of his territory.