Block chain doesn't replace trust. If you are strong enough, i.e. control enough mining activity, you pretty much can do whatever you want. All it does, is for

Block chain doesn't replace trust. If you are strong enough, i.e. control enough mining activity, you pretty much can do whatever you want. All it does, is formalize the same solutions for trust society has evolved. The downside is that it naturalizes the abuses and make them morally justified.