The best way to defend from raiders is to use an ender chest. Obviously you have to choose carefully what you put in it because it only has the capacity of a single chest, so that way things stay interesting and items can still be raided from bases.
I have quite enjoyed the 2b2t server because you have to constantly watch your back, though saying that 860, adam and I have built up quite a community already without anyone bothering us, but only because we have moved 50,000 units away from spawn (though there are old bases and griefed things we have found close by dated March 2013). The main drawback with the server though is that after 4 years of having 40+ people constantly online, we are living on quite old chunks and still have yet to catch even a glimpse of newer stuff like gem ore and quartz.
On 2b2t, one of the most exciting parts of the game is escaping the spawn area and starting a new life, the place is quite insane with no resources to be seen for quite a distance (see below). Big album here too.
I would be all for a GTAF no-rules, all out anarchy server (maybe with the exception of hacks, but either way it's still fun). It would be interesting to see how people's true characters show and what people come up with. There would have to be limits imposed on the map size though (maybe 5,000x5,000?) because otherwise people will just run a million miles away and live peacefully in stagnation.
However leaving the current map, I would feel bad for people like Ryan who have invested a lot into their huge creations while never having seen them used, maybe we could paste some of them dotted around the new server map for people to pillage and grief, giving a true post-apocalyptic feel.
Edited by epoxi, 03 July 2013 - 08:00 PM.