Some people have argued that the public should be alert and be careful of being cheated by crooks. We should not expect the Government to be able to stop all the crooks from operating.
I agree with this reasoning, up to a point. If a crook has been going around to cheat people and and complaints have been lodged to the "authority", it is the DUTY of the "authority" to take pro-active measures to stop the crooks from continuing their operations, especially as their identity is already known. It is NOT ACCEPTABLE for the "authority" to sit by, do nothing and let other people be cheated by the same crooks.
There are so many cases where complaints were lodged, and the crooks were allowed to continue their operations for a few more years. In the process, more people were cheated.
I do not understand why some people want to speak on give excuses on behalf of the "authority" which is neglecting its duty.