Personally I would have expected people to ask before just building in spawn as anyone could put up a sign saying anything, and if you just read this thread you would know that there was a plan for whats to be built in spawn. The spawn on the previous server became crowded with buildings and it became difficult to move anywhere without having to jumping around/through/over other peoples stuff, and I don't want this new spawn to become like that.
If you want to build in spawn then you should have made sure thats what people wanted first, and although I think people should have been given time to remove their own buildings or have garsands move them I also think that if they are blocking an area that is about to have a real building constructed there then by all rights it should be destroyed or it will just be wasting time.