Is it ever wise to play dumb?

All religious people play being dumb. They would rather be mindless sheep following dogma, customs and traditions rather than using the brain God gave them. We were put on this earth to learn, grow and develop as the unique individual beings that God created. The greatest gift that God gave us was freewill and with freewill comes responsibility. You do have the freewill to be dumb and you will be held responsible for your actions.