I'm worried about the high rate of post of people without any knowledge about Law subject are actively proposing the enactment of a death penalty, with vague words which could lede to unwanted situations and a lack of legal certainty due to imprecise criminal rules. 

The crimes and the rules which create them should and must be precise and interpreted in a restricted way. A conduct should only be punished if it  matches the forbidden behaviour. If it would not match exactly with that was ruled by the Criminal Law, it cannot be punished. 

Criminal Law is not the first way of solution of conflicts, it is an ultima ratio mechanism when the legally protected right requires it.ç

I hope the scientist view of things about Law would not bias the criminal system without proper review of Law experts.