Hopefully neighbors there will have each other’s backs. If it were the US, I wouldn’t be so sure of that. Patriotism for the most part does not extend past one’s front door for many here.
Neighbors will be burning up the wires to the snitch line if history is any guide. Significant fraction of Jews murdered by the old Nazis were ratted out by their neighbors. Homeowners’ Associations will probably have special committees to report gun owners.