My neighbours are poisoning my plants on my verandah!? What can I do? I'm guarding them tonight, the lights on my...

What can I do? I'm guarding them tonight, the lights on my verandah are on and I didn't put the curtains up!
But I can't do this every night?
How do I brand name them stop? They are absolute lunatics!
Answers:    Change your lighting fitting to a motion detecting one, so that as soon as they approach the light's come on. We put ours up after finding a prowler on our property and they are good when coming home surrounded by the dark.

Like others enjoy said try to get it on camera and capture legal guidance.
slap them