technically this is asking your own personal opinion but i will give an asnwer based on my knowledge of it:
"In my personal opinion, it is an unfair clause. If a criminal were to go to court for a crime and walk free he would never be able to be accused of that crime in the future. Detectives are always making new leads in cases and if they were to find any new eveidence, no matter how incriminating it was they would not be able to arrest him a second time.
Answer:
If the government is open to public criticism, political excesses can be brought forward and used to generate outrage among the voting populace to either get them removed from office or shine the light of truth upon those performing unsavory acts, hopefully shaming them into stopping or changing.
Explanation:
Basically, stopping leaders from becoming tyrants.
