...And rock salt was the accepted load. I wonder if they'll make children's books about trying to steal a lid of old man McDonald's pot?
Seriously, though. I didn't even think about the plants being legal and therefore have value and could make them worth defending. But you right. Doubt if it will sway many people concerning the level of response, though.
In most states, a person is not justified in using deadly force (such as shooting at a someone, whether you hit them or not) to protect property or even to protect against minor assaults. Each state is different and many make exceptions for arson; some have laws allowing deadly force within a home, and some are even more expansive.
Regarding the post about deadly force in Texas above, it isn't that simple, even in Texas:
A person is justified in using deadly force against another to protect land or tangible, movable property:
(1) if he would be justified in using force against the other under Section 9.41; and
(2) when and to the degree he reasonably believes the deadly force is immediately necessary:
(A) to prevent the other's imminent commission of arson, burglary, robbery, aggravated robbery, theft during the nighttime, or criminal mischief during the nighttime; or
(B) to prevent the other who is fleeing immediately after committing burglary, robbery, aggravated robbery, or theft during the nighttime from escaping with the property; and
(3) he reasonably believes that:
(A) the land or property cannot be protected or recovered by any other means; or
(B) the use of force other than deadly force to protect or recover the land or property would expose the actor or another to a substantial risk of death or serious bodily injury.
The above is NOT LEGAL ADVICE. I simply attached a small bit of the Texas penal code. I strongly urge anyone who anticipates that they may shoot at someone for stealing their truck or their pot or their lawn flamingo to spend a few dollars and talk to an attorney knowledgeable about these things in your jurisdiction, BEFORE you do so.