Big problem with a clan claiming important spots @6001

Currently there is a clan called PHD which claims for example the Sabretooth spawn.
The refuse to open it.
Why is this still a problem? Is it not possible to block building in such areas?

Screenshot: https://s12.directupload.net/images/201004/rxhd9zmi.png

I already suggest that important areas such as strating area, cities, dungeons, obelisk, etc … should be connected with a non build path accross the map.

Then it is impossible to block anything, simple.

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