These rules make a reference to polite actions, but they surely need to be respected due to the fact that being ancient objects we have to keep them like this. Rule number 1, 2 and 3 make reference to your safety, since the stones could be very heavy and you could drop them on yourself and have severe issues. Rule 3 and 4 make a reference to direct self respect, because damaging old buildings or taking away these kinds is misbehaving. Also, taking away monuments is against the rules.
