Ghost's Definition of Multiple IDs:
1. Cannot be killed(literally) unless their heads (ids) have been chopped off(deleted) (PS: Please refer to the movie "Highlander" for details if you don't understand what I am saying here.)

2. The actions and talking habits of new ids are having same or similar patterns with the original ones.

3. Trying to attack(literally) the bystanders of the same posts furiously.

That'll be all, I think...