I am also thinking about this, maybe his main motive to destroy someone's reputation. But this way will not help him much imo.
There is no chance to destroy to destroy anyone's account if the person want to do so. Because:
1. The person would not be able to proof the ownership of the so called account.
2. There will have no password and email change at a time.
3. The real owner would be able to proof his/her ownership.
4. Payment address will not be changed.
But if anyone sell then all of these information must have to change.