sideline throw-in in the frontcout

I have noticed in our association that many officials who are at the lead will stand on the same side of the baseline as the trail when the trail makes a sideline throw-in in the frontcourt. Once the ball is in-bounded they immediately go back to the other side. Apparently this was taught in a camp at one time.

Do others do it this way? I see advantages and disadvantages in using this method.