These days any greenhouse is a target for the ripoffs. These guys are usually speedfreaks looking to steal to sell and buy meth.
I am using a canopy frame that I chain link fencing on all four walls. I welded all the canopy joints and welded a door frame and built a small lockable door.
I know they could cut through the chain link, but I have two floodlights that go on automatically when someone gets close to the sensors. As well as turning on the floodlights, a loud alarm goes off. I also have 3 big dogs that will wake me up if anyone is lurking.
If the alarm goes off, or if the dogs are alerting me, I will go out with a bright flashlight and a .45 with a laser sight. I think the red dot on their chest will give them the message without shooting.
What do you do to guard against the ripoffs, or the cops?
I don't have to worry about the cops, I have a MM card.