I'd have to disagree there. I would not fault an officer from using deadly force against a criminal waving a gun.
Waving a gun, even if it is unloaded or it is a toy, is an offense that you think warrants deadly force without trying to talk the criminal down first?
Does the race of the person waving the gun matter? Or do you think everyone who does it needs to get blasted?
http://www.alternet.org/civil-liberties/8-white-people-who-pointed-guns-police-officers-and-managed-not-get-killed
Actually a citizen IS required to know all the rules because a basic legal principle is that ignorance of the law is no excuse. Look up the phrase "Ignorantia juris non excusat" some time.
Actually, everyone knows, or at least should know this. The problem is, you cannot just blurt out a basic concept without understanding it or considering nuance. The actual implementation varies greatly from state to state. Additionally, interactions with other laws, intent with regards to situations where laws conflict or are ambiguous, as well as what happens when you receive improper or mistaken information about laws and your rights from government officials, and tons of other situations make things much more complex. I know you've seen a few legal shows, but it's not that simple. This is why we have a justice system. Cops don't, or at least should not, get to decide things on the spot.
Additionally, in situations with cops, the frequency of them giving improper or incorrect instructions, combined with their authority (especially their ability to use lethal force at their discretion), and the fact that laws are so complex and nuanced make it absolutely critical that cops are strictly regulated and the justice system is given ever opportunity to protect the rights and lives of all parties involved.
If I had sufficient resources, access, and the desire, I'm 100% certain I could scrutinize you and either find laws you had broken or catch you at the moment of breaking a law you were not aware of that would result in prison time for you.
In that situation, would you take your jail time like a man? Or say "fuck I should have take
n the time to understand every single law on the books."? then go into a your dark cell and serve your time without a single complaint?