Without personal commitment to the Lord, such prayers will at best do nothing, and at worst could backfire on the ones offering them. (The tenor of the bible is to make prayers FOR... not against, FOR... kings.)
When you become concerned with how bad your own heart is more than with how bad other hearts are, then you will be in a place to be leading the repentance that is needed to usher in a new blessing. Otherwise you will be a busybody bringing disrepute on the Lord.