Kenne, if you are in fear of your life or the life of another person, and Reasonable Articulatable Suspicion (RAS) directs you to deadly force in the continuum, then you would be well within your rights.
If the only problem you have besides this BG coming and seeing you twice is people digging in your trash, breaking leather is unnecessary and reckless IMHO.
In the event you have to draw the weapon and charge it (to be Condition 1), and the threat stops, like the question you posed, the person can go and report you to the police. What they want is to have you charged with brandishing (CA PC 417). The elements are not there. Here is the PC:
As long as the above didn't occur, you will be fine. I suggest you educate yourself not only on the Second Amendment, but the laws surrounding weapons in general. You will find a great deal of material on the forums, and there are several here that are more than willing to assist you.Code:CA PC 417(a) (1) Every person who, except in self-defense, in the presence of any other person, draws or exhibits any deadly weapon whatsoever, other than a firearm, in a rude, angry, or threatening manner, or who in any manner, unlawfully uses a deadly weapon other than a firearm in any fight or quarrel is guilty of a misdemeanor, punishable by imprisonment in a county jail for not less than 30 days.