Would it not be better if a guild was able to dismantle their regions/guild capital and move it somewhere else instead of being stuck on the map?(Sabotaging is just silly!)
What about making a cool-down period of maybe 3-7 days in order to avoid abuse of this option?
If we want more dynamic and exciting gameplay, then the guilds should be able to move around on the map and take active part in the fighting, be it defence or offence!
If a guild gets cut off on the map this option shouldn't be allowed of course, maybe implement a countdown before a guild capital or region can be abandoned?