As the in game laws currently stand, if a hitman begins shooting someone in the street, and the victim responds by pulling their own legal 1h pistol and successfully defends themselves by killing the hitman, they may now be /wanted for murder by any police that witnessed the event. If you defend your home in a raid (again with legal weapons), and kill the raider that is currently shooting at you, does the same occur? It could even be argued that bankers may not lethally defend the bank from a raid, despite it being a circumstance where they are directly aligned with government.
Consider this: 1h weapons are legal, 1h open carry might or might not be legal, but using your legal weapons to defend yourself will either lead to your death, if you fail, or your arrest if you succeed (and are witnessed by police). Why then are weapons legal at all? What other purpose does making a weapon legal serve?
If you shoot at your assailant but do not kill them, and flee? Are you then /wanted for shooting in public? Are we meant to just try and scare them off by pulling out a gun, and doing nothing with it? Using this logic, one should only ever use /000 when they are raided if they do not at all plan on engaging the raiders themselves, lest the police be the next assailants.
I feel that this is an oversight that - to a certain degree - takes something away from the RP rather than benefiting it.
I've included a link to a clip that shows the first example mentioned in this post. Though the recording lacks my own mic input, there is enough context to understand the events.
https://www.dropbox.com/s/c9edhvzbv7j39s2/Defence%20example.mp4?dl=0