How do you get banned from church?

back in the old days you were banned for being a heretic or a nonbeliever.

today is almost the same but it's not as aggressive. today people are breaking the church law in so many ways like the rape scandals in the church like worshipping the devil or breaking the church doctrine's. now people are breaking away from the church ever more faster. the world has become atheist because of these difficulties in the church. so religion is dieing slowly or is it not?