What happens if the zone still gets unwanted callers?
Most residents of zones report that they see a marked decrease in the number of unwanted callers. However, if someone still calls refuse to do business with them. Point out that the area is a NCCZ and that they have breached it. Make a note of who they are and any vehicle they are travelling in. If you suspect they have or intend to commit a crime, report it to the police.