Tractor by net=paranoia 101. Maybe it's one of the people on this site who walked on the property. They will know exactly what you are planning to do to catch them. I think I hear the twilight zone music.
I considered that possibility before creating this thread and actually hope they are a member of TBN because they'll know that I'm not playing games and take home security VERY seriously.
As for my exact plan of action, that will never be posted. Sure, they'll know that I'm planning to install cameras and motion detectors, but they won't know where they're installed... and yes, I do have plans that I won't post about. Oh, and they'll also know that I'm armed and plan to buy additional guns which should tell them that I'll use deadly force if necessary.
So am I worried? Not in the slightest. This is my home and I will protect it at all costs.