How to prevent others from stealing flowers on the public terrace?

On the whole fence, there is a slogan, and stealing is fined 200. It is impossible for a flower thief to come openly during the day, so the whole family will go out to enjoy the cool from 6: 00 to 9: 00. If there is a thief hanging around there often, you will stare at him together and he will be afraid of many people. Thieves are in the minority after all. If you watch them carefully, those people won't have the confidence to steal so hard. Talk to the neighbors and keep an eye on it for you.