Rule Suggestion

A new rule I think should be added (Somewhat a part of the failrp rule. Maybe put it as rule 11a. or something)
Common Sense RP -
Before doing something, think about if you or someone else would do that in real life. This means that just because the lawboard doesn't say having guns out in public is illegal, doesn't mean you can do it. Cops shouldn't arrest people shooting at them either - no officer in real life would run over to a guy shooting at him to handcuff him. He would act in self-defence and take out his gun.

Added - thanks for the suggestion.