To be perfectly honest, I think destroying of blocks should be disabled entirely in Wellington, except by the person(s) who placed the blocks.
I also noticed there is a lot of “road spam” (as I’ve dubbed it), where people place streets scattered throughout Wellington, preventing people from building there. I’ve tried to dig up roads that prevent me from placing a house, but I just keep pulling up dirt! 😛
If Wellington is a sanctuary, I personally believe that it should 100% function as such. Keep costs where they are for builders, but just make it so griefers (and cruel people in general) can’t just come in and wreck your stuff. If Wellington’s meant to be a Safe Zone, I think it should be safe.