You might want to consider writing a handwritten note, laminating it, and posting it right by where they get to your pond. Emotional appeals might deter some people that will ignore, or get a thrill out of, walking by a "NO TRESPASSING" sign.
"I've worked very hard to develop this pond for my family's enjoyment. When you come onto our property, you damage what we love and destroy my hard work. Please do not hurt us by trespassing on our land."
Last edited by txelen; 03/22/11 10:00 PM.
