> I mean, I can sue you for stealing US nuclear secrets. Now if only I had some evidence...

#1 - No you can't, because only government officials can prosecute "crimes", as opposed to civil causes of action. (I think this distinction is stupid; it is not part of anyone's view of the world and it doesn't have any useful effects. But it will definitely stop you from prosecuting someone for espionage.)

#2 - No, you can't, because you don't suffer any injury if em-bee steals US nuclear secrets.

> So you think it's a good idea to take legal action against someone with no proof and hope it just materializes over time?

Fishing expeditions are common and sometimes...legendary cough SCO-Linux dispute

i am not saying that doing that is always a good idea, but we are talking about amazon vs google, to competitors who have more resources than sense, so yes, absolutely.