[lincpimp]

So someone is dropping a duece in the pool and moving your "grass water" around? (note, use your neighbor's hose to water the garden while he is at work, saves on your water bill).

Just sit out back with a 12gauge and pump a few rounds into the ground when you see it happen.

I picked up some cheap cameras from sams a while back, they were wired and b/w but they did have some sort of night vision and worked fine. Pretty sure it was about 200 bucks, and could handle up to 4 cameras, came with 2. Not sure if they were weatherproof, but a small plexi box would not be hard to fab up.