Number one, if you are anything but a zoner, you are only allowed Cruiser's or larger in Omega 49. Pirating problem solved, but the lot of them are still allowed in:)
Number two: Corsairs should be respecting the agreement they have with the Zoners. If I was invited to a friends house, and someone else was there, and they had a fiver in their pocket, would I punch them in the face, take their money and then expect to be allowed to stay at my friends?
Probably not.
When the Corsairs attack those who we have invited into our system (I'm talking as a Zoner here.) then they are disrespecting us. That's pretty crap of you to be honest.
You want to pirate people? Don't do it in our system.
As an IMG:
I think that the idea of Corsairs pirating us is expected. I mean, come on, they're pirates.
Why do we mine there? It's the best mining in Sirius at the moment. Eventually, the IMG are gonna get annoyed, and then when the Corsairs bring 2 gunboats and a bomber to pirate a miner, they're gonna find that a Battlecruiser and a fighter wing are waiting for them.