I also think that the Necropolis should be allowed. From the little offline experience I have, the Necropolis is a useful feature. I've also had situations where, after an early battle, a message appeared saying "Everyone died!", because of some mine, and although I'm a beginner, the Necropolis shouldn't be removed. If the Necropolis contradicts the author's idea, it can always be banned as a separate item in the rules of that tournament. Besides, it's easier for the organizer - it's difficult to detect a Necropolis violation. And in general, tournaments have already been held and were quite successful, so the rules are fine.