I think there are a lot of people in this thread who would prefer it if raiding just didnt exist.
This is obviously not an option or at least the devs disagree with it so they are settling for the next best thing which is to push for as many nerfs as possible in order to make it useless.
It's hard to have a reasonable discussion about creating a successful, functional siege system without these people constantly trying to derail it.
To respond to the points made by avu: This has always been a high risk permadeath survival game, why should villages be excluded from this? Also, as I said before, long sieges means plenty of time to save all characters and valuables. That is a big deal. If people quitting is what worries you, I'd be more worried about the effects of stagnation as Ladygoo mentioned. End of world content is so tedious that everybody quits anyway. Proper siege system will create more interesting PvP, drama and community. If there is nothing to gain or lose then raiding, or rather PvP in general would be pointless and boring. What is the point if you are not risking everything? Play farmville if this is the gameplay you want.