Baise Moi

I recently watched a sick French film called "Baise Moi" (It means "Fuck Me" for those who still doesn't know any French curse words.). I had read somewhere that it was one of the sickest films ever made, that's why I found and watched it. But I don't really recommend people to watch it. Yes, it is sick, but it is poorly shot. No strong scenario, lots of hard-core sex scenes and lots of dead people. There is Thelma & Louise instead for those who want to watch a similar and much better scenario and there is Taxidermia for those who want to watch a good film with really really sick scenes and all that.
Anyhow the following contains some spoilers about the film, I suggest you not to read it if you still want to see the film.

This film made me ask a question. Imagine a situation in which there are some serial killers who kill for no reason almost everybody they come across. But "almost" everybody. They do usual shopping and even meet with some people and become friends, too. Imagine they are on TV everyday for a while, now. And most people can recognize them on sight. If they entered a shop just to buy some coffee and sandwiches with no intention to kill anybody, thus with no weapons on them, and the shopkeeper who recognized them and reached to his gun with fear and killed them. Would he be guilty? Yes, I know they already deserve to die, it's no loss. In fact they deserve to die a few times. But do you think the court would find the man guilty? I don't really trust the judging system of anywhere on the earth so if they applied all the rules properly; I think yes, they would charge him with something.