I mean the idea sounds pretty nice, but there is no real need for it in my opinion.
Pirating a lone miner is pretty pointless, as most of the time they will either be able to run in their small transports or just accept death as they won't pay a large amount to survive.
I agree with Denis though, it would be pretty unfair and onesided if only the miners would have the disadvantage.. pirates can cloak, if they really want to pirate the miners
Last words are for fools who have not yet said enough.