@lijun1994 you do not know that they will not ask again, you only hope they won't. Don't you know that everyone in your area knows about you paying people off to avoid trouble. They've heard of every time you've backed down & even paid extra when asked. The line of people asking for money will be endless...even the grandpa's who work for you brag about the money you give out, making everyone jealous & looking for ways to get their share. At this point it would be cheaper to hire a security guy to live on property & protect your interests when these kind of people come around. Provide him with free room, food & a big stick to get rid of pests!