Drag/drop potentially unlimited generated "creep" objects, but one at a time

What I currently have is a script to drag a 2D sprite. The problem is, the script runs off of the object to be dragged's tag.

However, If I have, for example, seventy of these same objects, then clicking and dragging on one will drag all objects with that tag.

To be more specific, my end-goal is to have potentially endless creeps (meaning several duplicates) spawning. clicking on any one creep and dragging it will only drag that one creep. Will I need a ton of tags to achieve this or is there a better way?

Here is my current code. If you reply with code, feel free to use either javascript or C#, I'm not picky.

Thanks for your input(s)!

 #pragma strict
 
 
 function Update ()
 {
     if (Input.GetMouseButton(0))
     {
         var hitInfo : RaycastHit2D = Physics2D.Raycast(Camera.main.ScreenToWorldPoint(Input.mousePosition), Vector2.zero);
  
         if(hitInfo.collider.tag == "Guard")
         {
             
             this.transform.position.x = hitInfo.point.x;
                this.transform.position.y = hitInfo.point.y;
             Debug.Log("object clicked: "+hitInfo.collider.tag);
         }  
     }
 }