As far legal your right I looked it up you can record anything that's outside in the public but it states that you can not point said camera at any ones windows or doors.He can record my back yard all day but he cannot train it on my windows or doors.therefore I'm allowed to whatever I need to protect my privacy this includes a laser in the hopes that I damage his camera and never once stepping foot on his property what I want to do to him is no different than what he is doing to us.
I am going to set the laser up in the very window his camera is pointed at this laser will be indoors pointing out my bedroom window so if his camera gets in the way of the beam I'm projecting out my own window at the sky so be it!!!!!!
Also love that idea... the dummy cameras can be very cheap. Buy a bunch, train on him, and for his added pleasure, whenever he comes out of the house run out and take pictures with the flash on max:eg: (Not sure how legal it is to take someone's picture on public property (or publicly accessible property) so check your local ordinances.)