Just to add to those people who always cite mmo = not single player : don't talk crap. Some of my happiest gaming moments ( not all) have been solo playing while guild mates are offline. EQ2, WoW, Lotro. All mmo's that in no way required you to group if you didn't want to. Original Planetside was heavily team based but had excellent opportunities for solo play.). I can safely say that the group of people that I've been hanging with for 15 years will agree
So to agree with an earlier post mmo is for lots of people. But not primarily group play. So if you're sick of solos complaining, just remember these guys want to do it on their own. Easy to be critical when you gave up and joined a big group. Rant over
As for the griefing I don't know. A system where honour or dishonour could be used I guess. So if you take place in a large scale raid and take lives and ships, you get some sort of social standing, be you pirate or loyalist. Would need factional suppliers with goodies to provide the motivation. But you offline raid and destroy stuff in your underpants you earn scumbag points. The more you do it, the less your factions will want to deal with you until eventually no one will touch you, not even Freeports. Could have guards at Freeports to drive these scumbags off. So their only option for spawning safely would be lawless areas. Could even possibly have redemption quest lines so if you were an asshole, you could approach a Freeport with stuff to try and bring your factional standings back up to basic Freeport status. Like a new start. But the quest should not be easy. Should be a pain in the balls