The simple rule for GF KP SM PuGing is to ask at the start how many of them know how to do a Puzzle at fabricator. If less than 3-4 people say «I know» - i quit.
err.. And how you will save the DPS and Healer from eating charges that way? You actually making Lorik to throw charges in all directions all over the room?
Most safest way to avoid charges for you AND your PUG group is to hide behind the Kolto Tank.
You are indeed right about the best method to avoid charges from Lorrick but if tank runs in a circle DPS and healer are not exactly immobile statues they can adjust, too