Prohibited items

In the airport, there are so many prohibited items like any object that can be used as a weapon. The lowly umbrella is not allowed and even the small flashlight can hold your departure. In train stations, the water bottle is prohibited because it can contain a lethal liquid that can harm people. Of course, any pointed material is also not allowed. But how about the pen or the pencil?

It is surprising that in one cemetery here, there are so many items that are prohibited like guns and other weapons, drugs, alcoholic drinks and even radio. It makes me wonder why such a prohibition when the cemetery is a resting place for the dead. So what is the problem when you have a gun, can you kill the dead in the cemetery?