The cool thing about the planetary shield, as well as the one on Cambridge, is that it wasn't just "wished" into being. I like how the people who put them up actually created a list of needed supplies, and then actually brought those supplies to the planet via train.
I don't mind terrorist attacks, as long as they stay within a reasonable scope. I've always thought that orbital bombardment is a bit hokey though.:)As a general rule, players shouldn't be doing things that their factions would never do. Just because you're affiliated with pirates doesn't mean you're bent on causing maximum death and destruction.
If you're going to attack NPCs and make news out of it, keep it real. Attack some convoys and claim that as your victory. No need to claim millions dead or cities destroyed, it just sounds silly. Remember, no matter what you claim in your RP report, in the game, the cities are still there and life goes on as if nothing ever happened. The most convincing RP-ing is the kind that works within this framework.
The only time "major" attacks work (such as Cambridge a while ago) is when they are announced WAY ahead of time, made reasonably plausible, and give other players plenty of time to respond.